318 piston and ring set 5.2 Magnum piston and ring set KB Hypereutectic flat top pistons and moly rings for use with 3.910 standard bore size 3.310 stock stroke 6.123 stock rod length and .984 stock wrist pin size. 5/64 5/64 3/16 ring grooves Compression ratio 10.1 with 60cc head; 9.6 with 64cc head; 9.2 with 68cc head.
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