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 minimise 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 pistons to 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 standardring gaps in the top groove

Piston Specifications :

• CID: 461
• Bore: 4.155
• Stroke: 4.000
• Rod Length: 6.135
• Compression Height: 1.615
• Compression Ratio with 100cc chamber volume: 8.88
• Compression Ratio with 117cc chamber volume: 7.95
• Compression Ratio with 124cc chamber volume: 7.60
• Dome Volume: -2.0cc
• Pin Type: Press Or Float
• Recommended Ring Set: Moly - SPE233K 030, STD Fit - SPR9905 030, File Fit - SPR9590 035
• Coated piston

Product Reviews for SPH661CP 030 - SPEEDPRO