SRP Pistons SRP Professional Pistons; Flat Top; Oil Rail Support Included; Set of 8 Pistons; Recommended RingSet: JG31F8-4155-3 CHEVROLET 400 SM BLOCK


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Part #: 271063
Notes: SRP Professional Pistons
Flat Top
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
MSRP: $715.14
Your Price: $645.26
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Specs

Bore 4.155
C/D 1
CID 377
CID 434
Comp Ratio @ 58cc 11.7:1
Comp Ratio @ 58cc 13.3:1
Comp Ratio @ 64cc 12.3:1
Comp Ratio @ 64cc 10.8:1
Comp Ratio @ 70cc 10.1:1
Comp Ratio @ 70cc 11.5:1
Dome CC -5
Gram Weight 383
Oversize 0.03
Rod 6.00
Rod 6.25
Stroke 3.48
Stroke 4.00

This Item Also Available In

Part Number Price Notes & Specs
271064 $645.26 Notes SRP Professional Pistons
Flat Top
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1.062
CID 421
Comp Ratio @ 58cc 12.9:1
Comp Ratio @ 64cc 12:1
Comp Ratio @ 70cc 11.2:1
Dome CC -5
Gram Weight 395
Oversize 0.03
Rod 6.00
Stroke 3.875
271065 $610.34 Notes SRP Professional Pistons
Flat Top
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1.125
CID 377
CID 406
Comp Ratio @ 58cc 12.5:1
Comp Ratio @ 58cc 11.7:1
Comp Ratio @ 64cc 10.8:1
Comp Ratio @ 64cc 11.6:1
Comp Ratio @ 70cc 10.1:1
Comp Ratio @ 70cc 10.9:1
Dome CC -5
Gram Weight 405
Oversize 0.03
Rod 6.125
Rod 6.00
Stroke 3.75
Stroke 3.48
271066 $655.18 Notes SRP Professional Pistons
Dome
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1.125
CID 406
CID 377
Comp Ratio @ 58cc 13.2:1
Comp Ratio @ 58cc 14.1:1
Comp Ratio @ 64cc 12.1:1
Comp Ratio @ 64cc 13:1
Comp Ratio @ 70cc 12:1
Comp Ratio @ 70cc 11.2:1
Dome CC 4
Gram Weight 424
Oversize 0.03
Rod 6.00
Rod 1.125
Stroke 3.75
Stroke 3.48
271067 $693.75 Notes SRP Professional Pistons
Inverted Dome
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1
CID 434
CID 377
Comp Ratio @ 58cc 10.3:1
Comp Ratio @ 58cc 11.6:1
Comp Ratio @ 64cc 10.9:1
Comp Ratio @ 64cc 9.6:1
Comp Ratio @ 70cc 9.1:1
Comp Ratio @ 70cc 10.3:1
Dome CC -16
Gram Weight 349
Oversize 0.03
Rod 6.25
Rod 6.00
Stroke 4.00
Stroke 3.48
271068 $693.75 Notes SRP Professional Pistons
Inverted Dome
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1.062
CID 421
Comp Ratio @ 58cc 11.3:1
Comp Ratio @ 64cc 10.6:1
Comp Ratio @ 70cc 10:1
Dome CC -16
Gram Weight 381
Oversize 0.03
Rod 6.00
Stroke 3.875
271069 $709.00 Notes SRP Professional Pistons
Inverted Dome
Oil Rail Support Included
Set of 8 Pistons
Recommended RingSet: JG31F8-4155-3
Bore 4.155
C/D 1.125
CID 377
CID 406
Comp Ratio @ 58cc 10.3:1
Comp Ratio @ 58cc 11:1
Comp Ratio @ 64cc 10.3:1
Comp Ratio @ 64cc 9.6:1
Comp Ratio @ 70cc 9.7:1
Comp Ratio @ 70cc 9.1:1
Dome CC -16
Gram Weight 391
Oversize 0.03
Rod 6.00
Rod 6.125
Stroke 3.48
Stroke 3.75

All Fitments

CHEVROLET
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
1970 - 1980 400 SMALL BLOCK ALL ALL ALL ALL ALL ALL

Product Description

SRP Professional Pistons include features used in professional racing such as lightweight forged side relief (FSR) forgings, high quality wrist pins, and precision CNC machined ring grooves and skirts. In addition, every package includes JE Pro Seal Premium Piston Rings. The included ring set features a 1.2 premium steel top ring, 1.5mm Napier (hooked face) second ring and 3.0mm standard tension oil ring. Every piston is designed and manufactured in the USA at the advanced JE/SRP Pistons manufacturing center.

SRP Professional piston designs were created using 3D computer modeling and tested for strength using Finite Element Analysis (FEA). Several revisions were made to optimize the strength and weight before manufacturing began. Unlike other piston manufacturers, JE/SRP Pistons manufacture billet pistons from solid pucks of aluminum for dyno testing in actual engines prior to approving the final forging designs.

Features

  • Advanced, lightweight FSR forging that eliminates stress concentrations for superior strength
  • Up to 20% lighter than traditional equivalent
  • High-silicon 4032 aluminum alloy for reduced piston-to-wall clearance and quiet operation
  • Accumulator grooves for improved ring seal
  • Designed for normally aspirated or moderate forced induction/nitrous applications

SRP Professional Pistons are Sold in Matched set of 4, 6 or 8.

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