Exhaust Headers for Mercedes Benz G55 AMG (2003-2011) 5.4L Supercharged V8

High-Flow Exhaust Headers for 2003-2011 Mercedes Benz C-Class (M113 / W203)

Designed for competitive track applications, these mid-length exhaust headers eliminate back pressure and increase volumetric efficiency for the M113 V8 engine.

The Stock C-Class Exhaust Restriction

The factory OEM exhaust manifolds on the W203 chassis, particularly within the extremely tight C55 AMG engine bay, are designed primarily for emissions compliance and packaging constraints rather than optimal airflow. The stock cast manifolds suffer from abrupt transitions and narrow primary runners, leading to severe exhaust gas back pressure. This bottleneck traps residual heat in the cylinder head, inducing heat soak, limiting high-RPM scavenging efficiency, and ultimately restricting the M113 V8's power potential and acoustic profile.

The Engineering Solution

These mid-length, high-flow headers directly address OEM flow restrictions by utilizing widened primary pipes and optimized merge collectors. By smoothing the exhaust pulse transitions, this system significantly reduces back pressure, allowing the engine to breathe freely. For naturally aspirated M113 engines, expect a typical yield of 7 to 10 percent in horsepower and torque, while supercharged variants can see up to 15 percent gains. The inclusion of downpipes provides a comprehensive flow upgrade, though professional installation is required as these headers must be welded to your existing exhaust system. Note that installation in the W203 chassis requires navigating an extremely tight engine bay.

Technical Specifications

Compatibility

• Fits LHD and RHD vehicles
• For Mercedes-Benz SL55 AMG
• For Mercedes-Benz CLS55 AMG
• For Mercedes-Benz E55 AMG
• For Mercedes-Benz C55 AMG
• For Mercedes-Benz SL500 AMG
• For Mercedes-Benz CLS500 AMG
• For Mercedes-Benz E500 AMG

Fitment Notices & Chassis Notes:

• W211 (E-Class) → steering shaft interference common
• W220 / C215 (S / CL) → subframe clearance issues
• R230 (SL) → tight around transmission tunnel
• W203 (C55 AMG) → extremely tight engine bay

The Mercedes Benz Precision Standard

Upgrading the exhaust flow on your German performance vehicle demands precise tuning and high-quality fabrication. These competition-only headers unlock the true aggressive tone of the M113 V8 while providing the reliable power output required for track applications. I RECOGNIZE THIS PRODUCT IS FOR COMPETITION USE ONLY. ALL OTHER USES ARE CONTRARY TO FEDERAL LAW.