Engines and Components› Pistons and Piston Rings

JE Pistons

SRP PRO 2618-SBF-4.125/1.090 CD/-5.

$199.72

SKU: J001 378881S

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Description

The JE Pistons 378881S is a set of pistons designed for engine rebuilding. These pistons feature a bore size of 4.125 inches, a stroke of 4.250 inches, and a rod length of 6.250 inches. The compression distance is 1.090 inches.

The piston set offers various compression ratios depending on the cylinder head volume: 13.9 with 58cc heads, 12.9 with 64cc heads, and 12.0 with 70cc heads.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandJE Pistons
Part NumberJ001 378881S

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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