90-110 & Defender V8 Head Gaskets & Oil Seals
Composite head gaskets are thicker than standard tin gaskets and will therefore lower the engine's compression ratio. Ideal for correcting compression ratio when heads/block faces have been skimmed. Not applicable 1995 on.
Approximate gasket thicknesses are as follows:
Standard (tin) gasket - 0.5 mm
Composite gasket - 1.2mm
Typical effect on compression ration:
Standard (tin) gaskets - 3cc
Composite gaskets - 10cc