The original exhaust manifold in the 07K 2.5 5-cylinder engine is made out of stamped sheet metal panels and therefore, its head flange is very thin, approximately 1/8”.Recently the...

The exhaust collector for the EVOheader has probably been the most challenging component to produce. The original mission of fabricating a true bolt-on header for the 07K engine that actually worked and increased performance...

The introduction of a thicker CNC-machined head flange with a brush finish helped improve the assembly and welding processes yielding a better looking header. Minute but effective changes...