Process West Black Reverse Inlet Manifold - Drive By Wire - WRX / STI 2006 - 2012 Cooling_Header and Intercooler Tanks R1 kits provide uncompromising quality

R1 kits provide uncompromising quality

The studs are naturally stronger due to their extra thickness and superior material quality but they also benefit from a much coarser rolled thread (meaning you can tighten them far more than the standard bolt which in turn will offer a much higher clamping load between both the cylinder head and block faces where you head gasket is situated

Manufactured with a much denser rubber compound than OEM mounts

The 95mm twin slash cut tailpipes tuck discreetly into the characteristic bumper of the STi

Samco pride themselves on being hand made here in the UK

Process West Black Reverse Inlet Manifold - Drive By Wire - WRX / STI 2006 - 2012 Cooling_Header and Intercooler Tanks R1 kits provide uncompromising qualityThe Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX STI when perfect aesthetics meet high end performance. What you see here is the result of years of research and testing, multiple prototypes and a ground up fully featured design process that makes this a key asset of our product range. Available in two major configurations they feature a full billet plenum with generous billet bell