Engines and Components› Pistons and Piston Rings

JE Pistons

BBC BIG CHF 3815 HEAD +15.6CC (6421

$1,276.96

SKU: J001 K421B100

In Stock
In Stock
Ships by Jun 8
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The JE Pistons K421B100 (also known as 352628) are high-performance, forged flat-top pistons designed for modified Chevrolet Small Block (SBC) 400 engines. They feature CNC machining and 2618 forged construction for dependability. These pistons are engineered for aftermarket 23° cylinder heads, featuring deep valve pockets and a low-friction skirt. They utilize 1/16, 1/16, 3/16 or 1/16, 1/16, 3mm rings, and include Pin #927-2750-15-51S, Double Spiro Locks #927-042-CS, Contact Reduction Grooves, and Double Pin Oilers.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

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

Available on iOS & Android

Specifications

BrandJE Pistons
Part NumberJ001 K421B100

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.

View Full Return Policy