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diamond pistons new for 17 season and have 14 nights of racing. 4.175 (50 over) 1.062 compression height. 462 gram, 7.7cc dome. used in chevy 420 motor. . pistons are in like new shape. pistons were 1400 new, asking 500 or best offer and will include shipping. pics upon request, 815-848-1241 or 36latemodel@gmail.com. located fairbury Ill.