318 dome piston and ring set 5.2 Magnum dome piston and ring set KB Hypereutectic high compression dome top pistons and moly rings for use with 3.940 .030 over 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 11.7 with 60cc head; 11-1 with 64cc head; 10.4 with 68cc head.
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