Exhaust Headers for Mercedes Benz CL55 AMG (2001-2006) 5.4L Supercharged V8High Flow Exhaust Headers for 2001 2006 Mercedes Benz CL Class (M113K C215) What it Does: Replaces the restrictive factory log style exhaust manifolds with mid length, high flow tubing to significantly reduce exhaust gas back pressure and increase supercharger efficiency. The Stock CL Class Exhaust Restriction The factory exhaust manifolds on the M113 and M113K V8 engines utilize a compressed, log style design engineered for packaging and emissions