Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB101.030/1 SET 4000BM8.030

$597.56

SKU: U00B KB101KTM.030

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Overview

The United Engine & Machine KB Performance Hyper Piston and Ring Kit is designed for Chevrolet Small Block V8 Gen I engines. This kit features pistons made from a cast 390 hypereutectic alloy, known for its strength and heat-treatment to T-6 standards.

The pistons have a dish style with a D-cup 2V design and a +22cc volume. The kit includes piston rings with a 1/16 in. x 1/16 in. x 3/16 in. configuration. It is intended for a 4.000 inch bore and is an .030 inch oversize replacement.

This piston kit is suitable for a wide range of applications, including street, towing, marine, and race use. It is engineered for 5.7L (350 cubic inch) engines and fits the Chevrolet SB V8 Gen I family, with a year range of 1958-2007.
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1 SET KB101.030/1 SET 4000BM8.030

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 KB101KTM.030
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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.

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