Grimmspeed Head Gasket Set [1.1mm] for Subaru 08-20 STI [EJ25B DAVCS] (124004) 40120 Stainless-steel oxygen wideband UEGO AFR

Stainless-steel oxygen wideband UEGO AFR sensor bungs are sold as a four-pack (30-4008-4PK) and individually (30-4008)

Increase valvetrain control

GM9-SPSS kit features a Sport pressure plate for a nice upgrade

sort of like a Heavyweight Champion Boxer in an Armani Suit not-so-subtly threatening to knock your teeth out

Headache-Free Install: Plug-and-play design makes turbo swaps easy

Grimmspeed Head Gasket Set [1.1mm] for Subaru 08-20 STI [EJ25B DAVCS] (124004) 40120 Stainless-steel oxygen wideband UEGO AFRGrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so its only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed EJ25 and FA20 Head Gasket Sets! Feature packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster. The GrimmSpeed Head Gaskets feature a multi layer steel (MLS) construction,