Cometic Cometic, builders cylinder base gasket set. 3-13/16″ copper

Description

Cometic Cometic, builders cylinder base gasket set. 3-13/16″ copper

84-99 Evo Big Twin with 3-13/16″ big bore cylinders (NU)

3-13/16″ big bore. With ‘type A’ style gaskets. Includes two of each in .005″, .010″, .015″ and .020″ thickness. These are specialty copper base gaskets for mechanics that want to achieve a specific compression ratio. Type A gasket explained: Type A’ gasket is the early type introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 Evo Big Twin models and will follow the contoures of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base.

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