Chrysler Plymouth Dodge Mopar 318 and 5.2 Magnum engine 390 stroker Icon forged flat top piston and ring set. This set works in either the older style 318 A engine or the newer 5.2 Magnum series engines. This forged 318 piston set is for use with a 4 inch stroker crankshaft; .030 oversize bore with a stock rod length of 6.123 in. and a pin size of .984 in. The pistons have 2 valve reliefs in them for valve clearance with higher lift cams. Compression is 12-1 with a 60cc chamber head or 11-1 with a 68cc chamber. Ring grooves are 1/16 1/16 3/16. They work with either a floating piston pin or pressed pin type connecting rod. Set includes 8 pistons, 8 piston pins, piston rings and pin lock rings.
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