Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB231.060/1 SET 4000BM8.

$494.28

SKU: U00B KB6231KTM.060

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

Moderate — 2–4 hours

Description

KB Performance Hyper piston and ring kits for GM V6 engines feature pistons cast from 390 hypereutectic alloy heat-treated to T-6 standards. These lightweight pistons are designed for improved throttle response and rpm changes, while withstanding high compression and temperatures.

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 KB6231KTM.060

Videos

How to Clock Piston Rings: Gap Orientation and Install Tips

How to Clock Piston Rings: Gap Orientation and Install Tips
Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?

Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?
End Gap Mistakes That Will RUIN Your Engine

End Gap Mistakes That Will RUIN Your Engine
The go to Ring compressor tool to install your pistons without damaging the piston rings. #rsgarage

The go to Ring compressor tool to install your pistons without damaging the piston rings. #rsgarage
How to Install Piston Rings | Engine Building 101

How to Install Piston Rings | Engine Building 101
Stock vs race pistons: Which is better?

Stock vs race pistons: Which is better?
All Piston Ring settings ✅

All Piston Ring settings ✅
piston rings position

piston rings position
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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