Exhaust Headers for Mercedes Benz S500 (1999-2006) 5.0L V8High Flow Exhaust Headers for 1999 2006 Mercedes Benz S Class (M113 W220) Application: Replaces restrictive factory exhaust manifolds with mid length, high flow headers to significantly reduce exhaust gas back pressure and optimize cylinder scavenging. The Stock S Class Exhaust Restriction OEM Mercedes Benz W220 exhaust manifolds are designed primarily for packaging efficiency and strict emissions compliance, utilizing narrow, cast log style runners.