$2500 - $5000

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2018-2021 E 63 AMG S is the result of in-house dyno development on the 4.0L M177 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration,...

RennTech headers for the 2002-2006 CLK 500 are hand built from mandrel-bent, seamless T-304 stainless tubing with CNC-machined flanges, then ceramic coated to keep heat out of the engine bay. They bolt straight to the factory downpipes. RennTech measures the gain at about 15...

As engine output climbs, the transmission becomes the weak link. RennTech's Transmission Upgrade for the 2002-2006 CLK 500 is a mechanical rebuild and upgrade of the clutch packs, adding friction material so more torque goes through each gear without slipping.Features Complete disassembly and inspection...

RennTech treats the gearbox as part of the power upgrade. For the 2004-2010 CLK 350, the transmission is fully disassembled and inspected, the clutch packs are upgraded for more friction capacity, and it is rebuilt with new gaskets, seals, O-rings and a new pan...

Heat soak is the enemy of a supercharged or twin-turbo Mercedes. RennTech's second-generation intercooler pump for the 2011-2014 CLS 63 AMG flows 8.7 GPM at 11.6 PSI, against about 3.0 GPM from the factory pump, for cooler, denser charge air.Features Flows 8.7 GPM at...

RennTech's Carbon Rear Diffuser for the 2011-2014 CLS 63 AMG is made from pre-preg carbon fiber, the aerospace-grade process with tight control of resin content, weight and thickness. It is designed in-house to match the lines of the car and to fit without modifying...

RennTech packages its most popular upgrades for the 2011-2014 CLS 63 AMG into one matched R1 Performance Package. Each part is calibrated to work with the others on the 5.5L M157 twin-turbo V8. RennTech rates the CLS 63 AMG at up to 696 hp...

RennTech's 82 mm throttle body for the 2008-2014 C 63 AMG flows about 22% more air than stock. The billet aluminum housing bolts on with no changes to the intake manifold and sharpens throttle response along with a small power gain.Features 82 mm bore,...

RennTech headers for the 2008-2014 C 63 AMG are hand built from mandrel-bent, seamless T-304 stainless tubing with CNC-machined flanges, then ceramic coated to keep heat out of the engine bay. They bolt straight to the factory downpipes. RennTech measures the gain at about...

RennTech's Sport Mufflers for the 2015-2021 C 63 AMG are hand made from T-304 stainless steel and tuned to remove cabin drone while giving the car a deeper, more serious voice. Less back pressure and better scavenging also free up power.Watch it explainedFeatures Tuned...

RennTech's Valved Sport Mufflers for the 2015-2021 C 63 AMG are hand made from T-304 stainless steel and tuned to remove cabin drone while giving the car a deeper, more serious voice. Less back pressure and better scavenging also free up power.Features Tuned to...

RennTech's Sport Mufflers for the 2015-2021 C 63 S AMG are hand made from T-304 stainless steel and tuned to remove cabin drone while giving the car a deeper, more serious voice. Less back pressure and better scavenging also free up power.Watch it explainedFeatures...

This RennTech exhaust for the 2015-2021 C 63 S AMG is built from T-304 stainless steel, lighter than the factory parts, and voiced to sound rich outside without droning inside at cruise.Features Tuned to remove cabin drone Lighter than the factory exhaust Reduced back...

Eisenmann Rear Muffler - Porsche Panamera, 4, 4S, Turbo 2010-2017 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand...

Eisenmann Rear Muffler - Porsche 981 Cayman GT4, Boxster S 2013-2016 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by...

Eisenmann Rear Muffler Black Series - Mercedes E55 AMG Limousine W211 2002-2005 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built...

Eisenmann Rear Muffler - Mercedes E55 AMG Limousine W211 2002-2005 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand...

Eisenmann Rear Muffler With Valve Control - Mercedes C63 S AMG W205 2015-2017 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are...

Eisenmann Rear Muffler Black Series - Bmw X6M E71 2010-2013 DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on Porsche and AMG cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on Porsche and AMG cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on Porsche and AMG cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...

DESCRIPTION: Eisenmann's engineers are responsible for designing the OEM systems seen on cars, and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create an old world craftsmanship...