GrimmSpeed Tumbler to Engine Gaskets (Pair) Subaru Subaru K&N has seen gains of

K&N has seen gains of 12whp on an STI

This DDMWorks silicone tube fits manual transmission MINI's and has a smooth finish on the inside which helps to promote a higher velocity air charge

The first PERRIN Performance intake to get CARB approval

5” oval tips to produce one of the best sounds out of your vehicle

Invidia Regular N1 Muffler Catback for the 2002-2007 Subaru WRX/STI

GrimmSpeed Tumbler to Engine Gaskets (Pair) Subaru Subaru K&N has seen gains ofGrimmSpeed Tumbler to Engine Gaskets GrimmSpeed offers an enlarged variation of the standard size OEM gasket. Why do you want the enlarged bore style vs. OEM style? The OEM gasket hole diameter is much smaller than the TGV itself so you are very limited on matching up the ports of the outlet of the intake manifold going into the inlet of the TGV. GrimmSpeed's gasket will not intrude into the flow path, restricting flow! FITMENT: Subaru STI 2004 2014