Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB160.STD/1 SET 4125AM8.STD

$610.76

SKU: U00B KB160KTM.STD

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

KB Series Hypereutectic 390 Alloy with 16% Silicon Pistons. T-6 heat treat piston with machining features of next generation forgings. Advantages: lower conductivity, reflective piston top lowers oil temperatures, reduces combustion heat and pressure lost. Tight suggested clearances reduce noise and oil consumption. Includes lockrings and pins. Sets of 8. High Performance - Marine - Drag - Circle Track - Towing. CNC machined pin bores, Diamond Finished Skirts, Machined in Oil Returns, Accumulator Grove, Fully Machined head and valve reliefs, Mini Grooves to reduce scuffing if overheated, Triple Spiral Lock Rings.
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1 SET KB160.STD/1 SET 4125AM8.STD

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB160KTM.STD

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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