Ford FE 427 Piston Set Forged Dish 4.250 bore 4.250 stroke .990 pin 9.7-1 compression with 82cc head chamber; 6.700 rod. CH 1.330 Weight 521 grams; valve relief volume -17.0cc Ring grooves 1/16 1/16 3/16.4032 Forged pistons for high performance and racing engine use. Will work with OEM cast iron head chambers MR; HR and TP as well as DOVE and Edelbrock aluminum head chambers. Piston set includes 8 forged pistons; 8 premium 8620 piston pins and set of spiro locks. Part number Diamond 42520
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