Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET IC9958.030/1 SET 4250AM8

$910.12

SKU: U00B IC9958KTM.030

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

Icon's FHR (Formed Head Relief) pistons. Valve reliefs are formed into the piston during forging. Many FHR dome pistons have a solid dome for custom compression ratio machining. Made from 11% silicon 4032 aluminum for tighter piston-to-wall clearance, decreased friction, extended piston life, and reduced wear. Features mini grooves for heat transfer, UEM machined skirts, die-formed relief valves, and an accumulator groove for ring seal. Wrist pins and spiral locks included. Rings not included (IC9958KTM Ring Set available for +$75.00).

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B IC9958KTM.030

Videos

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ICON FORGED PISTONS, why you need them!!
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2618 or 4032? Tips for Choosing the Best Piston Alloy for Your Performance Engine from RaceTec

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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