Exhaust Headers for Mercedes Benz E55 AMG (2003-2006) 5.4L Supercharged V8High Flow Exhaust Headers for 2003 2006 Mercedes Benz E Class (M113K W211) What it Does: These mid length, weld on exhaust headers replace the restrictive factory manifolds to drastically reduce exhaust back pressure and increase scavenging efficiency for M113 and M113K V8 engines. The Stock W211 Exhaust Restriction The factory Mercedes Benz exhaust manifolds on the M113 and M113K engines are notoriously crimped and restrictive, designed primarily for