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JE Pistons 309948

Professional Series Flat Top Pistons SB-Chevy 400

JE Pistons 309948


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Estimated ship date 08/03/17 if Ordered Today
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JE Pistons 309948 Professional Series Flat Top Pistons SB-Chevy 400 $675.41
Professional Series Flat Top Pistons
  • SB-Chevy 400
  • Bore: 4.125''
  • Compression Ratios: 58cc/11.6, 64cc/10.8, 70cc/10.1

  • Specifications:

    Manufacturer's Part Number:

    SRP Professional Pistons have professional racing characteristics, such as lightweight forged side relief (FSR) forgings, high-quality wrist pins, and CNC-machined ring grooves and skirts. In addition, every package includes JE Pro Seal Premium Piston Rings that feature 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 made in the USA at the advanced JE/SRP Pistons manufacturing center.

    The development of SRP Professional took place over the course of an entire year. The piston designs were created using 3-D 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 make billet pistons from solid pucks of aluminum for dyno testing in actual engines prior to approving the final forging designs.

    Piston Design
  • 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
  • Now includes high-performance skirt coating!

  • Lightweight, low friction metric ring package included
  • 1.2mm top ring, 1.5mm Napier 2nd ring, 3.0mm standard tension oil ring
  • Napier 2nd ring for improved oil control
  • Minimal filing required

    Pins & Locks
  • Quality 2.250" pin further reduces reciprocating weight
  • Carbon steel wire locks included

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