Speed Pro 350 ci SB Chev - Flat Top Hypereutectic Pistons (SPH345DCP 040)

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 standard ring gaps in the top groove

Piston Specifications :

• CID: 357
• Bore: 4.040
• Stroke: 3.480
• Rod Length: 5.700
• Compression Height: 1.548
• Compression Ratio with 58cc chamber volume: 10.84
• Compression Ratio with 64cc chamber volume: 10.10
• Compression Ratio with 76cc chamber volume: 8.92
• Dome Volume: -6.9cc
• Pin Type: Press or Floated
• Ring Size: 5/64" - 5/64" - 3/16"
• Recommended Ring Set: Cast - SPE251X 040, Moly - SPE251K 040