Speed Pro Chevy 350 5.7L Sealed Power Hypereutectic Coated Skirt Pistons Set (8x H345DCP)

These Speed-Pro Digital Diamond Profile (DDP) hypereutectic pistons feature a new digital actuated diamond turning process that produces precision skirt profiles. This new Digital Diamond Profile (DDP) technology creates a unique barrel profile of the pistons, promoting an oil wedge between the piston skirt and the cylinder wall. They feature a newly designed ring groove geometry using Thermal Arching Compensation (TAC) that machines the piston ring grooves with an uptilt to offset thermal arching distortion. This squares the ring face up to the cylinder wall for increased power and decreased oil consumption. The Speed-Pro Digital Diamond Profile hypereutectic pistons feature the next generation of Duroshield skirt coating, reducing friction across the entire rpm range and increasing wear resistance for longer life and superior noise and vibration reduction. They also use precision-machined piston pin bores that allow for either fixed or floating wrist pins. The pistons come weight-matched to a 4 gram (+/-2 grams) maximum variation within every engine set.

Federal Mogul/Speed Pro Piston Part Number	Application	Power Range	Special requirements	Compression information	Ring groove size Pin diameter	Rod length Stroke	Deck clearance Skirt clearance
H345ACP STD (H345DCP) We also have other sizes available.	Chevrolet 350ci V-8 - 4.000" bore (at STANDARD) 1982-90 Car (USA) Can be used with other Chevrolet 350ci engines as a performance upgrade. Flat head w/4-valve reliefs. Perf. or reg. duty operation. Not OE duplicate Wt.; Use as sets only.	idle to 6000+rpm	Good for street/strip or light race	1.548 compression distance -5cc head volume Compression ratio (at +.030"): w/58cc heads 9.97:1 w/64cc heads 9.35:1 w/72cc heads 8.65:1 w/76cc heads 8.34:1	5/64" 5/64" 3/16" ring grooves .928" pin diam. Press-fit These pistons can be free floated but LR63 locks must be purchased separately.	Stock 5.700" length rods Stock 3.480" stroke	.025" deck clr .0010" skirt clr