Platinum Series Pistons - 4.280 -20 Dished

These pistons are a 4.280" (.030 over) bore -20cc DISHED piston which will work in a 383 block with either our 3.75" stroke and 6.76" rod "438CI" stroker combination, or our 4.25" stroke and 6.535" rod "496CI" stroker combination. All our platinum pistons use 1/16, 1/16, 3/16 ring pack for less frictional loss, and weight saving, full floating .990 pin size. The compression ratios and distance below deck will change slightly depending on which stroker combination you are using these pistons with. See the table below for detailed compression ratios.

Bore Size:	Dish (-) or  Dome (+) CC's	Compression Height:	Distance Below Deck:	65CC	72CC	75CC	78CC	84CC	86CC	88CC	Part#:
For 383>>496 Stroker Kit: (4.250" stroke / 6.535" Rod)
4.280 (.030 over)	-20	1.320"	-.000"	11.58	10.85	10.57	10.30	9.81	9.66	9.51	5042
For 383>>438 Stroker Kit: (3.750" stroke / 6.76" Rod)
4.280 (.030 over)	-20	1.320"	-.025"	9.79	9.22	9.00	8.78	8.39	8.27	8.15	5042