SPH139CL 030



$507.76

inc. GST


SKU: SPH139CL 030

BRAND: Speed Pro

302 ci SB Ford - Flat Top Hypereutectic Pistons
347 c.i., 4.030" bore, 3.400 stroke, 5.400" rod length, .912 Pin -5.0cc dome volume


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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: 347
  • Bore: 4.030
  • Stroke: 3.400
  • Rod Length: 5.400
  • Compression Height: 1.090
  • Compression Ratio with 58cc chamber volume: 10.47
  • Compression Ratio with 60cc chamber volume: 10.20
  • Compression Ratio with 63cc chamber volume: 9.90
  • Dome Volume: -5.0cc
  • Pin Type: Floater with tapered lightweight pin
  • Recommended Ring Set: Moly - N/A, STD Fit - SPR9968 030, File Fit - SPR9342 035
  • CNC machined, lightweight, coated skirt

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