Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

KB HYP PISTON KIT PONT 455

$690.92

SKU: U00B KB371KTM.030

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The KB371KTM.030 Piston Kit from United Engine & Machine Co is designed for Pontiac 455 CID V8 engines with a .030 inch overbore. It is made from 390 high-silicon aluminum alloy, heat-treated for strength and durability, and features a lightweight design for improved engine response. The piston has a hard anodized top ring groove for increased wear resistance and is compatible with stock and most aftermarket connecting rods and crankshafts. It is suitable for street and moderate racing applications, and each kit includes 8 pistons.

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 KB371KTM.030

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