Engines and Components› Pistons and Piston Rings

JE Pistons

BBC 20'' -4.600/.990/18CC

$252.49

SKU: J001 377891S

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The JE Pistons 377891S is a set of forged pistons designed for BBC engines with a 4.600-inch bore. Constructed from 2618-T6 aluminum, these pistons feature a dome style and are engineered for high-performance applications, including drag racing. The set includes features like accumulator grooves, double pin oilers, and ultra grooves with vertical gas ports.

These pistons are specifically designed to be used with Dart 20-degree Pro 1 cylinder heads (97cc chamber) or Brodix SR20 cylinder heads (95cc chamber). They are sold as a set of 8 and come with included wrist pins and round wire locks. The ring package size is .043in, .043in, 3.0mm, but the rings are not included.

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 377891S

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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