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Cometic big bore Twin Cam head and base gaskets are sized for 4 1/8-inch applications and supplied as head and base components for rebuilds. The design promotes even load distribution across the sealing surface, reduces bore distortion and minimizes the need for additional sealants or re-torque. These gaskets are tailored for thorough engine work where predictable sealing and longevity are required.
Cometic Jims 4 1/8in Twin Cam H&B Only .040in H/G,.020inBase Kit
