Product images and videos 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.
Engines and Components› Pistons and Piston Rings
United Engine & Machine Co
KB HYP PISTON KIT SBF 351W
SKU: U00B KB136KTD.020
Advanced — 4+ hours
Overview
Each kit includes fully machined crowns and valve pockets. The lightweight design of these KB hypereutectic pistons helps improve throttle response and rpm changes while maintaining the strength needed for high compression and temperatures. This specific kit features a 4.020 in. bore size and a dome piston style with two valve reliefs.
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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
| Brand | United Engine & Machine Co |
| Part Number | U00B KB136KTD.020 |
Videos
Engine Failure!? Watch if you are running Hypereutectic pistons!
The Truth: Cast vs Hypereutectic Pistons - Which One Is Better? | Engine Building 101 |
Engine Building Part 2 - Gapping Rings, Installing Pistons in a 350 Chevy
Piston Rings: Types, Gapping, Prep And Break-In For The Home Engine Builder
End Gap Mistakes That Will RUIN Your Engine
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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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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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