Grimmspeed Exhaust Manifold to Head Gaskets (Pair) - EJ/FA Engine - 020001 License Plate Delete it also disables the multiplex

it also disables the multiplex code P0600 so that you can run an error free ecu

these are referred to as gas springs

Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel

-8AN Male To -8ORB with 1/8NPT Gauge Port Adapter - Black - 9193-08-08-2

As always the case with GrimmSpeed Products

Grimmspeed Exhaust Manifold to Head Gaskets (Pair) - EJ/FA Engine - 020001 License Plate Delete it also disables the multiplexAt GrimmSpeed we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi layer steel OEM style gaskets. The issue with the most exhaust gaskets (including OEM) is that even if they're multi layer, they're not completely constructed of Stainless Steel which leads to leaks. Well GrimmSpeed has your answer, premium multi layer steel w stainless steel fire ring gaskets at a great price. This product cross references