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No more Blow Off Valve Leaks!

GrimmSpeed Mitsubishi EVO Master Cylinder Brake Brace
  • 3x Thicker Than OEM Gasket

  • Rubber forms to bad mating surfaces

  • Metal interal layer to prevent blow-outs



We all know how bad the OEM Subaru Top Mount Intercooler Gaskets are. They are the greatest source of leaks in the entire intake stream. Fear not, GrimmSpeed has answered your call! We present to you the 3x thicker GrimmSpeed TMIC BOV Gasket. Not only is this gasket 3 times thicker, it also contains an inner metal layer that will help prevent blow outs. The TMIC surface and the BOV flange never seem to truly mate to each other. That's where the 3x thicker BOV Gasket's extra thickness comes in handy, creating a better seal for better protection against leaks.


The reinvention of heavy duty, it's what you can expect from GrimmSpeed™


2 Reviews

BRYANT RIDDLE 22nd Feb 2017


Top notch gasket! i have no issues with it at all. its alot thicker than the oem. i have had it installed for about 3 months no issues at all.

Brad Engstrom 28th Dec 2013

great gasket!

A while ago I had swapped out my turbo and intercooler, but in the process I messed up my BOV gasket, so I did something stupid and used Right Stuff to seal my BOV back to my intercooler. That worked until I needed to replace some parts, and ended up struggling to get the Right Stuff off, after that I decided to do it correctly and buy a gasket. I looked at a couple different ones and finally set on Grimmspeed. I am very happy I went with this gasket, no leaks and great performance, just what I expect from Grimmspeed.

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