Engines and Components› Pistons and Piston Rings

JE Pistons

CHEVY LS 3.900 STROKER WITH .927 PI

$1,262.96

SKU: J001 K0421X85

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The Wiseco K0421X85 Engine Piston Set is designed for highly modified Chevrolet LS engines, specifically those requiring a 4.085-inch bore, 3.900-inch stroke, and 6.125-inch connecting rod length. This set includes 8 forged 2618 aluminum pistons with ArmorGlide skirts, rings, and H13 wrist pins. It features a -9.00 CC dish volume, resulting in compression ratios of 10.6:1 with 65cc heads or 10.2:1 with 68cc heads. Compatible with LS92 valve pockets, making it suitable for LS3/LS92 cylinder heads. Recommended for naturally aspirated, boosted, and nitrous applications, with a pin upgrade advised for over 700HP builds.

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 K0421X85

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