Speed Pro 350 ci SB Chev - Flat Top Hypereutectic Pistons (SPH140CL 030)

SPH140CL 030 - S/B 350 CHEV FLAT TOP PISTON

355 c.i., 4.030" bore, 3.480 stroke, 6.000" rod length, -5.0cc dome volume

Part Number: SPH140CL 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 to retain standard ring gaps in the top groove

Piston Specifications :
CID: 355
Bore: 4.030

Stroke: 3.480
Rod Length: 6.000
Compression Height: 1.260

Compression Ratio with 64cc chamber volume: 9.73

Compression Ratio with 72cc chamber volume: 8.97

Compression Ratio with 76cc chamber volume: 8.63

Dome Volume: -5.0cc

Pin Type: Floater with tapered pin
Recommended Ring Set: Moly - N/A, STD Fit - SPR9968 030, File Fit - SPR9342 035

CNC machined, lightweight, coated skirt