Exterior Components› Body Panels and Components

United Engine & Machine Co

CHEVROLET 400 ROD 5.700 DCUP +22CC 2V KB HYPER PISTON SET

$74.92

SKU: U00B KB168.040

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

Advanced — 4+ hours

Description

The United Engine & Machine Co KB Series piston is a hypereutectic 390 alloy piston designed for Chevrolet Small Block V8 engines. This piston features a 23-degree dish (D-Cup) with two valve reliefs and a cylinder bore of 4.165 inches. It is intended for use with a 3.750-inch crankshaft stroke and a 5.700-inch connecting rod, resulting in a zero deck height of 9.025 inches.

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

BrandUnited Engine & Machine Co
Part NumberU00B KB168.040

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