Mercedes-Benz C63 AMG
The location and configuration of the factory airbox assemblies within the AMG engine bay created a unique challenge for the engineers at Carbonio. They had to figure out a way to satisfy the air demands of the 6.2-liter V8, and the answer was a pair of airbox assemblies with greater internal volume, flow optimized shape and internal high-flow filters. The autoclave pre-preg carbon-fiber construction gives the kit a factory look without the factory flow limitations. $1,950
Carbonio
877.446.8253
www.carbonio.net
Evosport has developed its Evo2 software and a race header system for the C63's already impressive V8. The mandrel-bent, T304 stainless, long-tube headers are hand-crafted and feature a tri-Y modular design with large primaries and precision TIG welds for optimal flow and durability. In addition to being optimized for the headers, Evo2 proprietary software is programmed to improve throttle response, recalibrate ignition timing and eliminate that pesky top-speed governor. Contact for pricing.
Evosport
714.901.3100
www.evosport.com
Developed using variable active damping technology, Evosport's C63 crankshaft pulley is designed to reduce rotational mass for increased power while offering the same vibration resistance inherent in the stock design. The pulley itself is cut from high-grade T-6061 aluminum then fully anodized black for durability and a stealthy install. $1,995
Evosport
714.901.3100
www.evosport.com
Renntech stainless-steel headers are designed as direct replacements for the factory log-style exhaust manifolds and require no additional modifications to fit. Unlike the log manifolds, where each cylinder dumps into one bottlenecked common area before its gases are forced out, Renntech headers have been designed to give each cylinder its own path, effectively reducing backpressure while increasing power and mid-range throttle response. $4,995
Renntech
561.845.7888
www.renntechmercedes.com
If you browse the list of Mercedes vehicles equipped with the 6.2-liter AMG V8 you'll notice their power and torque level vary according to model. Each application has been electronically manipulated based on the target vehicle. Renntech offers two ways to uncork the C63's 6.2-liter V8 and realize its full potential. Upgrade 1 bumps power to 476 hp and 460 lb-ft of torque. Upgrade 2 takes the de-restriction further with more aggressive throttle mapping and pushing output to 501 hp and 475 lb-ft. Along with additional power, top speed can be increased from 155 to 187 mph.
Upgrade 1: $2,495; Upgrade 2: $3,495
Renntech
561.845.7888
www.renntechmercedes.com
VRP's VR530 Power Package for the C63 is comprised of four main parts. The 10-percent larger diameter alternator and water pump pullies are machined from T6061 billet aluminum to reduce parasitic drag, increasing throttle response and reducing drivetrain loss. The low-restriction air filters help keep the air supply up. Phenolic spacers help keep intake temperatures down by reducing the amount of heat transferred from the cylinder heads into the intake manifold. To take advantage of the reduced intake temperatures, an extension harness relocates the intake air temperature sensor from the firewall to further up front by the driver's side fog light. $749
VRP
877.310.4224
www.vrptuning.com
Audi RS4
Again, GruppeM has taken intake development to an entirely different level. Going well beyond the simplistic ?filter on a stick? concept, GruppeM reengineered the RS4?s intake into a fully sealed system that draws pressurized air directly from the grille?like a stock airbox, but with larger volume. Air enters through a specially designed cone filter and is then fed directly into the engine. Carbon fiber construction matches the RS4?s factory engine covers and a red silicone coupler matches the valve covers for a faithful factory look. $1,264.77
GruppeM
www.gruppem.co.jp
Milltek has designed a pair of sport downpipes to complement its cat-back exhaust system. These pipes replace the four extremely restrictive stock catalytic convertors (two pre-cats and two catalysts) found in the OEM exhaust system. The 63.5mm (2.5-inch) sport downpipes feature precision-cut flanges, heavy-duty flex joints and mounting brackets. Milltek employs HJS 200 CPSI (Cells Per Square Inch) catalytic converters for maximum flow and reliability. $2,199
Milltek
866.533.1777
www.stratmosphere.com
One of the RS4's coolest features is its ability to change its exhaust tone with simple push of a button. Milltek has developed a versatile stainless-steel cat-back exhaust that gives customers the choice of maintaining this feature or deleting it. The key feature of the dual 63.5mm (2.5-inch) system is the front H-pipe designed to allow excess pressure from one side of the exhaust to bleed over to the other in order to maximize flow throughout the entire powerband. The 160mm-wide oval tips are available in either a polished or special 'thermoset' black powdercoat finish. $1,699-$2,999
Milltek
866.533.1777
www.stratmosphere.com
MTM's 530-hp supercharger kit effectively gives the RS4 the kind of horsepower some feel it should have had the day it left the factory. Not that 420 hp is anything to sniff at, but expectations are understandably high for the RS model line. The best feature of this kit, besides the increase in power, is its superior build quality and factory appearance. If not for the MTM logo, one look at the intake manifold would have you convinced it was OEM-issue. $49,980
MTM
www.mtm-online.de
It seems that no matter how good a car performs from the factory, manufacturers always leave room for improvement. While the modest 10-20 hp gains (based on fuel octane levels) seem hardly worth the expense when compared to a turbocharged engine, the benefits from optimized ignition timing, a recalibrated electronic gas pedal, increased rev limiter and removal of the top-speed governor are worth every penny. Neuspeed's Power Pack includes a K&N high-flow air filter and new software for both of the RS4's MED9 engine control units. $744.95
Neuspeed
805.388.7171
www.neuspeed.com