GrimmSpeed Head Gasket Set 1.05mm 15-21 WRX / 13-21 BRZ / 13-16 FRS / 17-21 GT86 / 14-18 Forester XT

GrimmSpeed continues its legacy of precision and quality with the FA20 Head Gasket Sets—engineered to deliver unbeatable sealing performance for both naturally aspirated and high-horsepower builds. Designed for FA20F DIT (WRX) and FA20D (BRZ, FRS, 86) engines, these gaskets ensure reliability whether you’re refreshing your engine or pushing a full race setup.

Features:

• Multi-Layer Steel (MLS) Construction: Provides consistent, high-strength sealing across the combustion chamber.
• Folded Stopper Layer: Optimizes combustion chamber sealing to prevent leaks under extreme cylinder pressures.
• Nitrile Rubberized Coating: Reduces risk of leaks on imperfect mating surfaces, accommodating RA finishes up to 50 microinch.
• Multiple Thickness Options: Available in .78mm, 1.05mm, and 1.45mm for precise build tuning.
• Oversized Bore Capacity: Supports up to 86.5mm, allowing up to 0.5mm overbore for custom builds.
• Left and Right Side Specific: Sold as a complete set for full engine coverage.

Tested for Performance:
GrimmSpeed’s innovative design uses strategically undercut middle layers to ensure even crushing and perfect sealing across the combustion chamber. Pressure-sensitive film testing confirms even distribution, keeping combustion gases where they belong—pushing the piston, not escaping past the gasket.

Fitments:

• 2015-2020 Subaru WRX [FA20F DIT]
• 2014-2018 Subaru Forester XT [FA20F DIT]
• 2013-2020 Subaru BRZ [FA20D]
• 2013-2016 Scion FRS [FA20D]
• 2017-2021 Toyota GT86 [FA20D]