JE IMCA/USRA 2-Barrel Lightweight Flat Top Pistons - Engine Builder Magazine

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JE IMCA/USRA 2-Barrel Lightweight Flat Top Pistons

JE is excited to add another part number to our circle track arsenal with this ultra-lightweight IMCA/USRA 2-barrel piston.

Engine Builder
By Engine Builder

JE is excited to add another part number to our circle track arsenal with this ultra-lightweight IMCA/USRA 2-barrel piston. Designed for racing application specific performance, these pistons feature:

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• Extremely lightweight (383g) for maximized off-the-corner acceleration
• Bore sizes range from 4.030in to 4.065in with .005in increments to maximize block compatibility.
• Strut lightening holes help remove mass and improve windage
.043in gas nitrided top, .043in Napier second, and 3mm oil ring reduces drag
• Accumulator and contact reduction grooves
• Double pin oiling

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These pistons are forged from 2618T aluminum alloy and machined on dedicated CNC machine cells to tight tolerances. 2618 aluminum has a lower silicon content than other alloys. That makes the pistons stronger and more ductile—perfect for high-load, high-stress applications like superchargers, turbochargers, or nitrous oxide. 

Other features include:• Rated to handle up to 1,500 horsepower• -21.1cc dish with two valve reliefs• Lateral gas-ported to maintain tighter piston-to-bore clearances for better sealing• 10.5:1 compression on E85 with 1.338-inch compression height• .990-inch chromoly wristpins for use with wire locks• Choice of 4.225- or 4.250-inch bore sizes

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