Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB184.STD/1 SET 4320AM8.STD

$774.12

SKU: U00B KB184KTM.STD

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

Moderate — 2–4 hours

Description

Hypereutectic pistons (390 alloy with 16% silicon) for high-performance applications (marine, drag race, circle track, street, towing). Features low expansion, tight piston-to-wall clearance, fully machined head and valve reliefs, triple spiral lock rings, CNC machined pin bores, accumulator groove, machined oil returns, diamond finished skirts, and mini grooves. Wrist pins and spiral locks included. Rings (5/64 x 5/64 x 3/16) not included.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB184KTM.STD

Videos

We are gearing up with speed of air pistons

We are gearing up with speed of air pistons
#shorts Installing Press Fit Pistons on Connecting Rods

#shorts Installing Press Fit Pistons on Connecting Rods

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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