HKS Gasket T=0.5mm for FA20 GT86/BRZ

Notes:

• Opposed Bead Stopper Type Metal Gasket for the FA20 engine of 86/BRZ provides higher bore sealing durability than a stock gasket.
  2 types of the gasket are available. One is t0.5 increased compression ratio type for an NA engine (ε12.6&la

• rr;12.5, supercharger installable, Endurable approximately 300ps)and another type is t0.7 high engine output type for a supercharged engine (ε12.4←ε12.5, Endurable approximately 600ps with supercharger)

  Fe

• ature

  POINT-1 Maintain a high seal with high pressure!

  Both types are endurable against high engine output. Stopper structure of the bore seal is separated type so it prevents leakage even under high gas-pressure

• at high engine output.

  POINT-2 Compression Ratio for an NA engine is increased!

  The t0.5 type (supercharger installable) for an NA engine was designed to increase the compression ratio compared to a stock gasket as well as

• seal durability. Also, it is thinner than a stock. It is the best to use for one make race with an NA engine. Compression ratio of the gasket for an NA engine is ε12.6. Its thickness is t0.5. (Stock compression ratio is ε12.5 and thicknes
• s is t0.6.)

  POINT-3 Contact surface pressure is improved!

  Special coating was applied on the head side and cylinder side to improve sealing performance when tightening the bolts.

  POINT-4 Bore seal pressure

• was confirmed in figures. (See the diagram below.)

  The Performance requirement from Head Gasket.

  As the cylinder block and head are not rigid body, when the Head Bolts are tightened, the gap bet

• ween the surfaces and the surface pressure applied is not even across the whole surface. Moreover, due to combustion pressure and vibration while driving, the conditions are continually changing and the contact surface is being continually beaten. As a re
• sult, a good gasket must ensure that contact surface pressure is spread as evenly as possible and also adapt quickly to the ever changing gaps that can appear in the contact surface to maintain a good seal with good pressure.

   

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