Speed Pro 454 ci BB Chev - Dome Top Hypereutectic Pistons (SPH426CP 030)

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 toretain standard ring gaps in the top groove

Piston Specifications :

• CID: 461
• Bore: 4.280
• Stroke: 4.000
• Rod Length: 6.135
• Compression Height: 1.640
• Compression Ratio with 100cc chamber volume: 9.84
• Compression Ratio with 117cc chamber volume: 8.69
• Compression Ratio with 124cc chamber volume: 8.27
• Dome Volume: +10.5cc
• Pin Type: Press or Float
• Recommended Ring Set: Moly - SPE233K 030, STD Fit - SPR9905 030, File Fit - SPR9590 035
• Coated skirt