Code No. 23001-AT004
0.5mm, 0.7mm, and 1.0mm thick bore stopper type metal head gaskets are available for the FA20 engine of 86 & BRZ.This gasket provides higher bore sealing durability than stock. Use with HKS Capacity Upgrade Kit or Supercharger Kit provides the optimum performance.
※These are design calculation ratios.
＜POINT-1＞ Maintain high seal with high power!
All three types are durable against the high engine output. Stopper structure of the bore seal is designed to be a separated type to prevent leakage even under high gas-pressure at high engine output.
＜POINT-2＞ Contact surface pressure is improved!
Special coating was applied on the head and cylinder side to improve sealing performance when tightening the bolts.
With t=0.5mm gasket, NA engine’s compression ratio increases compared with the stock!
The durability of the bore seal of this gasket t=0.5mm for NA engine is improved, and the compression ratio increase compared with the stock that makes this gasket ideal for one-make race. (This gasket can be installed to a supercharged engine.)
t=0.7mm for Supercharged Engine
The t=0.7mm type utilizes a stopper taller than the t=0.5mm type to provide higher bore seal durability. With a stock pistons, the compression ratio is reduced only by 0.1; it allows to maintain high heat efficiency.
t=1.0mm for HKS Capacity Upgrade Kit + Supercharger
Installing the t=1.0 type gasket to a vehicle with the supercharger enables to adjust the compression ratio of Capacity Upgrade Kit; setting range can be widened.
|Engine||Thickness (mm)||Compression Ratio||Bore||Code No.||Price||Remarks|
|FA20||1.0||ε=11.7||φ89.5||23001-AT004||For supercharger engine, LH/RH each, opposed bead stopper type|