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JE Pistons 243018

LS Series 350 Series FSR Flat Top Pistons Bore 4.125 /Stroke 4.000


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Estimated to ship directly from the manufacturer on 06/05/18
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JE Pistons 243018 LS Series 350 Series FSR Flat Top Pistons Bore 4.125 /Stroke 4.000 $777.10
LS Series 350 Series FSR Flat Top Pistons
  • Bore 4.125 /Stroke 4.000
  • Ring Size: 1.5, 1.5, 3MM

  • JE Pistons 243018 Details

    SB-Chevy LS Series FSR Flat Top

    Forged Side Relief (FSR) for LS1, LS6, Z06, 5.7L, 6.0L

    Our New FSR (Forged Side Relief) slipper forging design allows the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearence problems. Lightweight and extremely durable, these pistons are machined for 1.5, 1.5, 3mm rings and have an inverted dome designed to achieve optimum compression ratio with forced induction applications (CR calculated with .042 gasket thickness and 0.00" deck clearence).

  • 427 cid
  • Rod Length: 6.125"
  • Block Height: 9.240
  • Dome Volume: -5.0
  • Comp Height: 1.115
    Compression Ratio:
  • 12.1 with 64cc
  • 11.9 with 66cc
  • 11.1 with 72cc

  • Specifications:

    Manufacturer's Part Number:

    JE Pistons can make it happen, and that's probably why more engine builders choose them. JE's success, though due to many factors, is mainly thanks to their high-tech, CNC-based manufacturing facility which produces thousands of accurate, identical pistons. JE was the first and is the only manufacturer to use Ultra-Crown 3-D technology. Considered an industry standard among the racing elite, this technology allows you to take advantage of one of racing's most guarded secrets.

    Ford 302 Inverted Dome: These pistons are designed to be compatible with forced induction and nitrous applications. The valve reliefs are machined to accommodate larger valves and long duration, tight lobe separation cams.

    Note: Pistons sets are sold 8 per package except for Buick V6.

    Some parts are not legal for use in California or other states with similar laws / regulations