Speed Pro CHEV/ HOLDEN LS2 PISTONS 4.000" BORE, .945" PIN, 1.325" PISTONS - H857CP (SPH857CP STD)

These ruggedly durable pistons are made with exclusive high strength FM425 alloy, and enhanced with 16.5%silicon for excellent tensile strength and scuff resistance.This advanced metallurgy permits tighter bore clearances, which help minimize noise on cold engine start-up. These pistons are the ideal choice for street performance applications and late-model replacement.

More Sealed Power hypereutectics benefits:

• Higher strength than cast or forged at operating temperature
• Finely dispersed silicon particles provide a highly resistant wear surface and reduces scuffing
• Lower material growth allows pistonsto be fit tighter, improving cylinder sealing for less blow-by and more power
• High silicon content allows elimination of groove inserts in certain applications
• Designed to retain standard ring gaps in the top groove

Piston Specifications :

• CID: 364
• Bore: 4.000
• Stroke: 3.622
• Rod Length: 6.098
• Compression Height: 1.325
• Compression Ratio with 64.5cc chamber volume: 11.09
• Dome Volume: -.007cc
• Pin Type: Press pin
• Recommended Ring Set: Moly - SPR10603 5