Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB214.STD/1 SET 4000BD8.005

$479.42

SKU: U00B KB6214KTD.STD

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

Professional / shop required

Description

The KB Performance Hyper piston and ring kits are made from 390 hypereutectic alloy, heat-treated to T-6 standards for increased strength. They feature fully machined crowns and valve pockets, a 4.000 inch bore, 3.480 inch stroke, and 5.700 inch rod length, designed for GM V6 engines. These lightweight pistons improve throttle response and rpm changes while withstanding high compression and temperatures. Kits include piston ring sets with moly-coated cast iron or ductile iron top rings.

Fitment

Fitment Guaranteed

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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 KB6214KTD.STD

Videos

KB Pistons and Ring End Gap

KB Pistons and Ring End Gap
Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?

Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?
How to Choose The Right Pistons

How to Choose The Right Pistons
Cast vs. Forged Pistons: Which One is Best for Your Engine?

Cast vs. Forged Pistons: Which One is Best for Your Engine?

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.

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