HKS Grommet Type for GT86 & BRZ FA20 engine

HKS metal grommet type headgaskets are designed for high boost applications. They provide a more reliable seal than traditional stopper type.

Features:

• Gas seal surface pressure is maintained to increase the seal limits.
• Combining with strengthened ARP head bolts for even higher seal strength.
• 0.8mm & 1.2mm available.

When used with the HKS 2.1l low comp step 2 kit the compression ratio is calculated at 

0.8mm is 10.8

1.mm is 10.4