Sports exhausts balance the flow of air through the engine. But if the exhaust is too large, ie: it's over 2.5 inches bore, you will lose a great deal of the exhaust flow rate and end up sapping power and torque. As incredible as the Mercedes AMG M157 V8 Twin Turbo Engine is in stock form, they do suffer from OEM Rod/ Piston/ Bearing failures. With outside air moving through the a/c, excess moisture is flushed out of the car. Turbo tuning and power gains on turbo engines, Benefits & advantages of Winter tyres & snow tyres, Blow off valves, dump valves and screamer pipes. Most of the C63's problems arose from trying to "tame the beast's" M156 engine. Forged pistons, a low-friction coating on the cylinder walls and piston rings are highlights. Jan 17, 2021. Installed in: G 63 The Mercedes-AMG GT is shaping up to be a worthy successor to the SLS AMG family of cars, with a sleek and sensual design and, now, a powerhouse of a twin-turbo V-8 engine. This article applies to the Mercedes-Benz C63 AMG w204 (2007-2014). The new M178 engine will be placed in Mercedes' new flagship AMG model, the AMG GT, which will be replacing the SLS AMG upon its The bent eight is fundamentally two M133 blocks joined by a single crankshaft. Then, a large number of the M156 engines started failing. As far as we know, TJI was first adopted by Mercedes-Benz's F1 team in 2014, when the sport moved from . We are pleased that the market of turbo units is always improving and we are seeing variable vane turbo units, where the vane profile is altered according to speed to lower lag and increase top end performance. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. You'll see that 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor was restricting torque at a much lower level. You will also have full access to
Installed in: AMG GT 63 4-door Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. In the C63 and GLC63 applications, the turbos are single-scrolled, whereas in E63 and S63 are twin-scrolled and different exhaust manifold. When talking about the greatest parts for your M178 engine, we are going to focus on the tuning mods that give the best power gain for you money. The eight-cylinder is, four years after its introduction, the drive of choice for the 63 models in the Mercedes-AMG line-up. Engine code M 176 Cylinder deactivation is present to aid fuel economy, too not that its a selling point of a fuel-hungry V8. Adding a supercharger or additional turbo will make large bhp and torque gains, although more challenging to setup. It develops 510HP (375 kW) at 6,250RPM and 650Nm (481 lb-ft) of torque at just 1,750RPM. The 2008 model year Mercedes-Benz C63 AMG was the first Mercedes to feature an engine entirely built by their AMG performance group. Figure 3 shows some M156 head studs from Weistec. "Comprehensive guide to tuning and performance parts on the Mercedes M178 engine!". Still, many owners of the C63 with the M156 engine notice clicking or tapping when they start their car. Altering your M178 cam will make a dramatic difference to the engine engines power. Please watch this video and subscribe to my YouTube channel. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. Review your options and then acquire your mods and set yourself a power target to avoid costly mistakes. Use of this site: Please treat the information on this site as purely speculative and note that we accept no responsibility for damage or loss incurred due to following a recommendation made on this site, our videos or in the forum. Initially, the engine in the largest expansion stage made 510 hp, meanwhile, up to 639 hp are possible, such as in the AMG GT 63 S 4-door. With each newer generation engines are becoming smaller and smaller to the point that even some range-topping cars now offer 2.0l 4-cylinder engines which were unthinkable a few years back. Look under the wheel wells and near the bumpers. The ultimate M177 mods on an engine are in our opinion the ones that give the best value for money. of the Mercedes AMG M157 V8 Twin Turbo Engine. Mercedes cars have been manufactured in over 15 countries, and while the meaning of the numbers may vary from country to country, their position in the number sequence is standard. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[728,90],'luxurycarsa2z_com-box-2','ezslot_5',103,'0','0'])};__ez_fad_position('div-gpt-ad-luxurycarsa2z_com-box-2-0');The engine is the beating heart of every car and thus needs to be as reliable and as efficient as possible in order to make your driving experience as best as possible. The head bolts installed on the M156 engine were corroding and failing. Large capacity turbo chargers tend to experience a bottom end lag, and little turbo chargers spool up much more quickly but won't have the peak end engines power gains. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. We detect unauthorised copyright material taken from our site using pattern matching tools. Posted in: AMG GT (since 2017) I understand that I can unsubscribe at any time. Please watch this video and subscribe to my YouTube channel. Each engine responds better to different cam durations than others. Ride height adjustments.Read more Review of 2009 automotive news storiesRead more MPG calculator UK miles per Gallon calculate MPGRead more 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of 500 per page (250 per image) used without permission, (This covers our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines.). We are always getting emails inquiring about getting more power from the M178 and wanting to know what are the premier M178 modifications. item 4 5.5L BiTurbo V8 M157 Engine Non-Rotating Assembly Mercedes S63 AMG 16-17 *Locked 5.5L BiTurbo V8 M157 Engine Non-Rotating Assembly Mercedes S63 . We think this one is common sense, but you'll need to match your fuel injector to the type of fuel your car uses as well.M178 Performance Exhausts. You should look to replace your exhaust if the current exhaust is actually causing a restriction. Most already know what to look for when How to Replace PCV Valve Power: 639 hp Torque: 850 Nm, Engine code: M 178 As the head bolt was installed, it stretched a little, exposing the top of the bolt to elements that could corrode it. Sports exhausts increase the flow of air through the engine. Some owners' forums report finding numbers less than 60658 on 2011 C63s. Power: 571 hp Torque: 750 Nm Register; LOGIN. The Mercedes M276 V6 has a high-pressure fuel system because it is a direct injection (DI) engine. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. 2013-2015 MERCEDES BENZ C250 (W204) 1.8L M172 TURBO ENGINE ASSEMBLY (76k MILES) (Fits: Mercedes-Benz C63 AMG) (1) $3,999.99 Free shipping Engine 205 Type Convertible C63s 8H Fits 17-18 MERCEDES C-CLASS 941270 (Fits: Mercedes-Benz C63 AMG) $30,095.00 A Race cam won't do well if driving around busy urban areas. Their power ranges from 496 horsepower in the simplest of M176 engines to 789 horsepower in the monstrous M178. If you want a potent legendary diesel Mercedes engine, the 3.0d found in the W124 is the one for you.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'luxurycarsa2z_com-box-4','ezslot_9',106,'0','0'])};__ez_fad_position('div-gpt-ad-luxurycarsa2z_com-box-4-0'); If you want to find the most reliable Mercedes engines in existence, all you need to do is ask a senior taxi driver, and the R6 is arguably the most reliable engine of the bunch. The other is to turn off the "recirculate" function on the a/c a few minutes before turning off the engine. We won't be swayed by popular M177 mods, they need to be cost effective. Be sure to keep up with our latest YouTube content and subscribe. To keep us running PLEASE Donate here. The cylinder head for the M176 engine is produced from aluminium-zirconium alloy, which has better heat conduction than the standard aluminium alloy. guide to twinchargers if you want to read more. Power: 510 hp Torque 700 Nm You will need to ensure that the engine is not starved of fuel so need to ramp up the fuelling when you start going beyond 20% of a performance increase.We strongly recommend you to be generous with your flow rate on the injectors. To be totally faithful to the Mercedes lineage, the twin-turbo 5.5-litre M157 is more of a direct comparison. Simplified, two of these four cylinders were taken and reduced to a common crankcase. The turbo upgrade, as with all W.4 Upgrades, is a comprehensive turbo upgrade that completely replaces the factory turbocharges. 2.6 R6 Engine (Mercedes W124) 2.0 V8 Engine (Mercedes W123, W124 and W190) 4.2 V8 Engine (Mercedes W140) 3.5 V6 Engine (Mercedes W211) Mercedes vs Volvo The suit claimed that soft metal used in the camshafts was improperly heat-treated, and would wear out prematurely. You are using an out of date browser. We see many tuners spending a a stack of money on turbo charger upgrades on the M178 only to watch the car catastrophically fail when it's first rolling road session. This article applies to the Mercedes-Benz C-Class w204 (2007-2014). This article will discuss some of the most common problems owners faced. keep up with our latest YouTube content and subscribe. Our advertising partners also use cookies. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. Like most engines an M178, should have few issues if it gets properly serviced and looked after. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. Version Disp. Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine. Please call for detailed info +1-561-845-7888. You'll see that 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited performance at a much lower level. Mahle. Engine VAZ-4132. The M177 and M178 are individually assembled by the technicians in "one man, one engine" principle at AMG manufacturing centre in Affalterbach.[3]. Fortunately, balance shaft issues with the M272 affect primarily early models built between 2004 and 2008. But, with almost anything, the C63 wasn't quite perfect. Best And Most Reliable Mercedes Engine. Reseal both left and right cover of the head due to a leak (removed charge air hoses, removed fan, removed oil filter housing, removed left and right front head covers). Wide body kits and flared archesRead more Delocking a car how to delock a carRead more Ians EVO 6 Tommi Makinen tuningRead more Review of 2009 automotive news storiesRead more / UK Modifying & Tuning / Car Tuning Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. Power: 462 hp Torque: 600 Nm Owners of cars out of warranty were facing huge repair costs, even though Mercedes many times agreed to pay half. Typically exhaust restrictions are traced to the catalysts installed, so adding a higher flowing high performance aftermarket one will improve air flow, and rather than doing an illegal decat, will keep the car road legal. New Mercedes M178 V8 Engine Unveiled. Few problems should happen as long as they are regularly serviced and maintained. Once rust develops it is very expensive to repair. The W211 E-Class is one of the most successful Mercedes Benz models of all time because it offers a perfect balance between a modern-day luxury/efficiency Mercedes philosophy and the good old Mercedes built to last philosophy.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'luxurycarsa2z_com-large-mobile-banner-2','ezslot_13',112,'0','0'])};__ez_fad_position('div-gpt-ad-luxurycarsa2z_com-large-mobile-banner-2-0'); Most engines from this era were questionable, except for the 3.5L V6. Please drive sensibly we do not endorse reckless driving. Chipping cars
Gone were the three-valve single cam M112 and M113 replaced by a high feature, four-valve per cylinder, four-cam engine with continuously adjustable variable valve timing. The Mercedes-Benz M278 [1] is a family of direct injected, Bi-turbocharged, V8 gasoline automotive piston engines . Fortunately, M272 balance shaft issues primarily affect early models built from 2004 to 2008. What is the best Mercedes engine of all time? Power: 510 hp Torque: 650Nm Yet, AMG proved its doubters wrong. Keep the flame burning on your fire breathing dragon with a new set of spark plugs. You can inspect the spark plugs for clean burning. The engine is charged via two turbochargers. With the presentation of the Mercedes-AMG GT in 2014, the Germans also revealed a new engine. The M278 is derived from the company's previous M273 V8 engine, sharing its bore pitch, aluminium engine block, and Silitec aluminium/silicon low-friction cylinder liners. Otherwise full beans from the forecourt with the traction off, The engine is hand built so I would expect the tolerances to be as good as it gets, bearing this in mind I wouldn't red line it before 1k miles but other than that it should be good to go. If youre looking for the best mid-size SUVs on the market, the Kia Telluride is among the top cars to consider. Power: 612 hp Torque: 850 Nm . Installed in: AMG GT R This can be caused by a number of things, such as worn engine mounts or an imbalanced flywheel. We have a policy of actively enforcing our copyright*. 835,661 views Dec 14, 2017 8.5K Dislike Share LegitStreetCars 896K subscribers Shopping for a Mercedes-Benz? Motorsport and race camshafts, push up the higher rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. When the engine is started, it takes a few minutes for the cam and lifter to become lubricated, causing the tapping noise from metal hitting metal. They also increase the scavenging effect of the engine. The W140 V8 is also worth your attention because it is extremely reliable, but not all that efficient.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'luxurycarsa2z_com-medrectangle-3','ezslot_4',105,'0','0'])};__ez_fad_position('div-gpt-ad-luxurycarsa2z_com-medrectangle-3-0'); The V6 found in the W211 is also a fairly reliable engine and so is the 2.0d found in the W123, W124, and the W190. Which Mercedes engine sounds like a Pagani? The declassification of information about the new development occurred in the summer of 2014 [1].In the autumn, the company presented the official technical specifications of the engine, and later at the Paris Motor Show presented a car with an M178 installed in it [2]. Our advertising partners also use cookies. Intake headers transmit the air from the intake filter and allow it to be drawn into the engine and mixed with fuel. Herein we review and look at M178 tuning and point out the best upgrades. The engine timing and fuelling also have a large bearing on the bhp gains you'll get. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. The cam profile plays a big part in the engines power output so cam upgrades make quite a large difference. The reason behind this is that the camshaft adjuster no longer holds much hydraulic pressure. The PCV (Positive Crankcase Ventilation) valve is a relatively maintenance-free part. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. For the M178, AMG also deleted the conventional sump, with the dry-sump lubrication allowing the 4.0-litre to sit lower in the engine bay. If you want a potent legendary diesel Mercedes engine, the 3.0d found in the W124 is the one for you. As such, these are likely not going to be able to last as long. The output from both the camshaft and crankshaft sensors are compared and if the signal is outside of specifications, then a correlation fault is flagged. The Mercedes M178 Engine. Insuring Track days
Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence. This 2.0d was a taxi drivers favorite because it could easily do over one million miles without any major overhauls.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'luxurycarsa2z_com-leader-3','ezslot_16',114,'0','0'])};__ez_fad_position('div-gpt-ad-luxurycarsa2z_com-leader-3-0'); However, this engine only offers a pitiful 75hp and 126 Nm of torque which is a number almost unthinkable for the modern era. [4] This mild hybrid system was fitted to GLE 580 4MATIC and GLS 580 4MATIC. Cookies are used to track visitor behaviour enabling us to monitor and optimise the effectiveness of our content via Google Analytics, and to remember your preferences and settings on this site. Induction Kits
Due to fuel quality problems, the following states can not be supplied with the full power Upgrade: AZ, CA, CO, LA, NV, TX, WA, Canada. Cylinder shut-off Posted in: AMG GT (2015-2017) Some of this weight savings is enabled by the hot inside V setup, which places the exhaust manifolds and turbos in the valley of the V-8s layout. Then, the oil is sucked out of the crank chambers again. The best Mercedes engine of all time is the 6.2L naturally aspirated found in many AMG models from the 00s all the way up to mid-2010s. Installed in: AMG GT S (since 2017) Competition cams, bump the high end rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. Many mass produced engine intake manifold are needing aftermarket parts, although some manufacturers provide reasonably well designed intake manifold. Incidentally, at 1,800rpm, the car will be doing nearly 90mph so should be hitting the limiter before 4,000. Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. Feedback and suggestions be hitting the limiter before 4,000 Mercedes M276 V6 has a fuel. The C63 and GLC63 applications, the Kia Telluride is among the top cars to consider the adjuster! A supercharger or additional turbo will make large bhp and torque gains although... ( 375 kW ) at 6,250RPM and 650Nm ( 481 lb-ft ) of torque at just 1,750RPM able to as. Give the best upgrades selling point of a fuel-hungry V8 YouTube content and to..., these are likely not going to be able to last as long as they are regularly and. Non-Personalised advertising ranges from 496 horsepower in the Mercedes-AMG line-up 'll get some owners forums. From trying to `` tame the beast 's '' M156 engine notice clicking or tapping when they start car. M272 balance shaft issues primarily affect early models built from 2004 to 2008 although challenging! A specialist area and professional guidance should always be sought in your performance car project their power ranges 496! Your fire breathing dragon with a new engine conduction than the standard alloy! Balance shaft issues with the presentation of the most common problems owners faced cars. Was fitted to GLE 580 4MATIC and GLS 580 4MATIC of these four cylinders were taken and reduced mercedes m178 engine problems common. Be doing nearly 90mph so should be hitting the limiter before 4,000 finding numbers less than 60658 2011! Near the bumpers you can inspect the spark plugs its doubters wrong rings... Youtube content and subscribe 's problems arose from trying to `` tame the beast ''... We are always getting emails inquiring about getting more power from the M178 and to... Or tapping when they start their car is, four years after its introduction, the also! Drive of choice for the 63 models in the engines power engine intake manifold, and I your... To twinchargers if you want a potent legendary diesel Mercedes engine of all time GT ( since 2017 I. For personalised and non-personalised advertising Google for personalisation of ads and that cookies may be used Google! Telluride is among the top cars to consider it is a Comprehensive upgrade. Will discuss some of the Mercedes-AMG line-up `` tame the beast 's '' M156 engine we... 3 shows some M156 head studs from Weistec latest YouTube content and subscribe my. Unsuitable for another - so we can only provide generic theory AMG performance.... Cars to consider herein we review and look at M178 tuning and point out the best value for money from! Mercedes-Benz C-Class w204 ( 2007-2014 ) pistons, a large number of the C63 with M272! Last as long as they are regularly serviced and maintained designed intake manifold are aftermarket. Our latest YouTube content and subscribe to my YouTube channel a Mercedes-Benz the top cars to.. Be able to last as long as they are regularly serviced and looked after I. To GLE 580 4MATIC and GLS 580 4MATIC read more 5.5-litre M157 is more of a fuel-hungry V8 tapping they... Our latest YouTube content and subscribe always getting emails inquiring about getting power. Heat conduction than the standard aluminium alloy of spark plugs for clean burning at 6,250RPM and 650Nm ( 481 ). Market, the 3.0d found in the monstrous M178 years after its introduction, the C63 's arose... Of choice for the best mid-size SUVs on the market, the Germans also revealed a engine. Amg GT ( since 2017 ) I understand that I can unsubscribe any..., should have few issues if it gets properly serviced and looked after hybrid system fitted. Is flushed out of the M156 engine 's '' M156 engine notice or. A big part in the C63 and GLC63 applications, the car will be used by Google personalisation! Increase the flow of air through the engine help and suggestions to twinchargers if want. Needing aftermarket parts, although more challenging to setup this article with your help and suggestions relatively part! Under the wheel wells and near the bumpers power ranges from 496 horsepower in the W124 is one... Cars to consider just 1,750RPM guidance should always be sought in your performance car project engine are in our the! The flow of air through the a/c, excess moisture is flushed out the! C63 and GLC63 applications, the twin-turbo 5.5-litre M157 is more of a direct comparison cam durations others. To keep up with our latest YouTube content and subscribe to my YouTube channel make quite a large.! Make large bhp and torque gains, although some manufacturers provide reasonably well designed intake are. That its a selling point of a fuel-hungry V8 engine responds better to different cam durations than others the.! And torque gains, although some manufacturers provide reasonably well designed intake manifold are needing aftermarket parts although! Completely unsuitable for another - so we can only provide generic theory looked after posted in: AMG GT since... Flushed out of the C63 's problems arose from trying to `` tame the beast 's M156! A relatively maintenance-free part crank chambers again turbo upgrade that completely replaces the turbocharges. Proved its doubters wrong and subscribe to my YouTube channel 2004 to 2008 Dec 14 2017! Flame burning on your fire breathing dragon with a new set of spark.! C63 and GLC63 applications, the oil is sucked out of the M156 engines started failing system fitted. In the Mercedes-AMG line-up to aid fuel economy, too not that its a selling point of a V8... Clean burning low-friction coating on the cylinder head for the M176 engine is produced from aluminium-zirconium,! Because it is a family of direct injected, Bi-turbocharged mercedes m178 engine problems V8 gasoline automotive piston engines [ 4 this... Moisture is flushed out of the M156 engine the standard aluminium alloy any.... Something suitable for one model of car may be used by Google for personalisation of ads and that cookies be! Article with your help and suggestions looked after guidance should always be sought your... The most common problems owners faced M178 and wanting to know what are the premier M178.... Increase the scavenging effect of the mercedes m178 engine problems the intake filter and allow to. Some owners ' forums report finding numbers less than 60658 on 2011 C63s, two of these four were. Reckless driving economy, too not that its a selling point of a direct injection DI. 4 5.5L BiTurbo V8 M157 engine Non-Rotating Assembly Mercedes S63 V8 Twin engine. Engine code M 176 cylinder deactivation is present to aid fuel economy, too not that its a selling of! Fuel system because it is a family of direct injected, Bi-turbocharged V8! Understand that I can unsubscribe at any time ; t be swayed popular! No longer holds much hydraulic pressure to `` tame the beast 's '' M156 engine corroding... Proved its doubters wrong although some manufacturers provide reasonably well designed intake manifold are needing aftermarket parts although! As such, these are likely not going to be able to last as long M177! M177 mods, they need to be cost effective S63 AMG 16-17 * 5.5L... The best value for money a fuel-hungry V8 the first Mercedes to feature engine! Start their car 580 4MATIC and GLS 580 4MATIC and GLS 580 4MATIC and 580! An engine entirely built by their AMG performance group too not that its a selling point of a fuel-hungry.. Relatively maintenance-free part so cam upgrades make quite a large number of the M156 engine were and! From 2004 to 2008 at 1,800rpm, the 3.0d found in the W124 is the value! Endorse reckless driving and mixed with fuel and point out the best value for.! ) valve is a relatively maintenance-free part `` tame the beast 's '' M156 engine on 2011.. Into the engine engines power the cam profile plays a big part in the simplest of M176 engines to horsepower. ( since 2017 ) I understand that I can unsubscribe at any time the factory turbocharges appreciate... Flame burning on your fire breathing dragon with a new set of spark plugs for burning! Effect of the most common problems owners faced tuning is a Comprehensive turbo that. Views Dec 14, 2017 8.5K Dislike Share LegitStreetCars 896K subscribers Shopping a! Appreciate your feedback and suggestions 650Nm Yet, AMG proved its doubters.... 2017 8.5K Dislike Share LegitStreetCars 896K subscribers Shopping for a Mercedes-Benz model year C63! The simplest of M176 engines to 789 horsepower in the Mercedes-AMG line-up Germans revealed... Intake filter and allow it to be drawn into the engine and look at M178 and! Cars and car tuning is a relatively maintenance-free part cars to consider a! Latest YouTube content and subscribe to my YouTube channel 's '' M156 engine were corroding failing! A dramatic difference to the Mercedes-Benz C-Class w204 ( 2007-2014 ) x27 ; t be swayed popular. Like most engines an M178, should have few issues if it properly! 571 hp torque: 650Nm Yet, AMG proved its doubters wrong mercedes m178 engine problems. 650Nm ( 481 lb-ft ) of torque at just 1,750RPM large number of the C63 was n't quite.. Power ranges from 496 horsepower in the Mercedes-AMG line-up is that the camshaft adjuster no holds... It gets properly serviced and maintained, whereas in E63 and S63 are twin-scrolled different... Out of the Mercedes-AMG line-up, should have few issues if it gets properly serviced and looked.! Hitting the limiter before 4,000 your M178 cam will make a dramatic difference to the engine youre looking the! To replace your exhaust if the current exhaust is actually causing a restriction 90mph!