inc. GST

SKU: SRP271155

BRAND: SRP Pistons

Forged 4.080" Dish Top Piston Set, -26cc, 4.250" Stroke, 6.700" Rod
1.325" Comp Height. Suit Ford FE 391

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Our race-proven SRP design is now available for the Big Block "FE" series. Available for both stock stroke and stroker applications. Bore sizes for the 428 block are set at .025" over to allow the use of popular file-fit rings. These pistons offer thick .250" top ring lands for use with limited nitrous or boost while still offering substantial weight savings. Wrist pin diameter is .975" for part numbers designed for 6.490" OEM rods and .990" for part numbers designed for aftermarket 6.700" rods


  • Pin#: 975-2750-16-51S (Footnote P) or 990-2750-15-51S (Footnote E)
  • Double Spiro Locks (#990-042-CS)


  • Bore Diameter: 4.080
  • Compression Height: 1.325
  • Compression Ratio with 68cc chamber volume: 9.8
  • Compression Ratio with 72cc chamber volume: 9.5
  • Compression Ratio with 76cc chamber volume: 9.2
  • Piston Volume: -26
  • Cylinder Head: EDELBROCK 6007/08
  • Piston Pin Outside Diameter: 0.990
  • Piston Pin Length: 2.750
  • Piston Pin Material: 5115
  • Ringset Included: No
  • Top Compression Ring Thickness: 1/16"
  • Second Compression Ring Thickness: 1/16"
  • Oil Ring Thickness: 3/16"
  • Piston Material: 4032
  • Forging Type: FSR
  • Piston Avg Weight: 463
  • Pin Wall Thickness: 0.150
  • Piston Type: Dish
  • Ring Set: J100F8-4080-5

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