Exhaust Headers for Mercedes Benz C220 C230 SLK230 (1994-2004) 2.2L 2.3LHigh Flow T 304 Stainless Steel Exhaust Headers for 1994 2004 Mercedes Benz C Class, SLK Class (M111 W202 R170) What it Does: Replaces the restrictive factory cast iron manifold with a mandrel bent 4 2 1 stainless steel header to reduce backpressure and improve exhaust scavenging efficiency. The Stock C Class, SLK Class M111 Manifold Weakness The factory exhaust manifold on the M111 engine is a heavy, cast iron log style unit designed primarily for