Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB195.STD/1 SET 4125BD8.005

$584.02

SKU: U00B KB195KTD.STD

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Overview

The KB Performance pistons are designed for Chevrolet Small Block V8 engines. Constructed from hypereutectic aluminum alloy, these pistons are heat-treated to T6 standards, increasing their strength by 30 percent over standard hypereutectics. They feature CNC-machined crowns, a high upper compression ring location, gas-accumulator grooves, drilled oil returns, and spiral-lock retainer grooves for enhanced performance. The lightweight, rigid-rib skirt design ensures piston stability in the bore, leading to improved oil control, reduced blow-by, and increased ring life.

These pistons offer a tighter fit than forged types and help eliminate cold start-up knocking. They are available for various performance applications, from street and towing to marine and race. The KB195KTD.STD kit includes piston rings and is designed for engines with a 4.125 in. bore and a 3.480 in. stroke, suitable for a 377 cubic inch displacement with a 6.000 in. rod length. They feature a solid dome design with two valve reliefs and come with wrist pins and retainers.
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1 SET KB195.STD/1 SET 4125BD8.005

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.

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB195KTD.STD
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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.

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