Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

KB HYP PISTON KIT BBC 427

$652.76

SKU: U00B KB360KTM.070

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

Professional / shop required

Description

Keith Black Hypereutectic pistons are designed for high-performance marine, drag race, circle track, street, or towing applications. They feature a low expansion 390 alloy with 16 percent silicon and fully machined heads with valve reliefs.

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 KB360KTM.070

Videos

Engine Failure!? Watch if you are running Hypereutectic pistons!

Engine Failure!? Watch if you are running Hypereutectic pistons!
KB Pistons and Ring End Gap

KB Pistons and Ring End Gap

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