GrimmSpeed FA20 Head Gaskets 15-21 WRX / 13-20 BRZ/FRS/86

GrimmSpeed FA20 Head Gaskets 15-21 WRX / 13-20 BRZ/FRS/86


GrimmSpeed Head Gaskets are Feature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster.



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SEAL the deal with a set of GrimmSpeed FA20 Head Gaskets!

GrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it’s only natural that we should offer our fans the MOST important gaskets their car will ever need: Introducing The GrimmSpeed FA20 Head Gasket Sets!

The GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better seal the non-critical areas of the gasket. In addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber. This is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.

After talking to numerous engine builders/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build. With that in mind, we’ve made the gaskets available in multiple thicknesses (.78, 1.05, 1.45mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore.

The FA gaskets were designed to be compatible in both FA20A (WRX) and FA20B (BRZ, FRS, 86). Meaning that it will be just as much at home in a lower power NA build as it will be in a high power boosted application.

We’ve outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of quality that you’ve come to know from our other extremely popular gaskets.

Quick Specs

  • Sold as a Set/Pair – L and R side specific
  • Die Cut Multi-Layer [Stainless] Steel (MLS) Construction – Provides smooth edge finish and consistency from batch to batch, ±0.001” manufacturing tolerance
  • Folded Stopper Layer to Better Seal the Combustion Chamber
  • .25micron Nitrile Rubber Layer Coating – Reduces chances of leaking on imperfectly smooth mating surfaces over non-coated gasket.
  • Compatible with both FA20A (WRX) and FA20B (BRZ, FRS, 86)
  • Accommodates up to 86.5mm bore
  • 0.78mm, 1.05mm, 1.45mm thickness (after crushing)


Additional Information

Weight.9 lbs
Dimensions13 × 5 × .25 in

0.78mm, 1.05mm, 1.45mm


  • 2015-2021 WRX
  • 2014-2018 FXT