[Inside of head gasket] [C30A(NSX) Forged Piston KIT 92mm]
  The metal head gasket with 94mm bore and C30A standard head gasket thickness enables easier installing of TODA 92mm Forged Piston in overhauling.
*Cylinder block boring is required.
C30A Metal Head Gasket - Combined type

Engine type

 C30A
Part No. 12251-C30-010 ×2
Price ¥19,000 ×2
Thickness 1.0mm
Bore size ø94.0mm