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Engines and Components› Pistons and Piston Rings

Howards Cams

Howards Cams ProMax Flat Top Piston Set

$900.28 $740.99 Save $159.29

SKU: 840425205

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Overview

The Howards Cams ProMax 2618 forged pistons are engineered for high-performance racing applications, designed to withstand extreme stress and high RPMs. Crafted from 2618-T61 billet aluminum, these pistons offer superior strength and the ability to maintain shape under immense pressure, preventing issues like 'skirt shrinking'. Each piston features CNC-turned skirts for proper operation under intense heat and severe side loads without scuffing cylinder walls.

These flat-top pistons are designed with valve pockets accommodating large cam profiles and oversized valves. Standard features include forced pin oilers, accumulator grooves for improved ring seal, lightweight aircraft-quality wrist pins, and double spirolox locks. The ring groove sizes are 1.5, 1.5, and 3mm.
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The Howards Cams ProMax 2618 forged pistons are engineered for high-performance racing applications, designed to withstand extreme stress and high RPMs. Crafted from 2618-T61 billet aluminum, these pistons offer superior strength and the ability to maintain shape under immense pressure, preventing issues like 'skirt shrinking'. Each piston features CNC-turned skirts for proper operation under intense heat and severe side loads without scuffing cylinder walls. These flat-top pistons are designed with valve pockets accommodating large cam profiles and oversized valves. Standard features include forced pin oilers, accumulator grooves for improved ring seal, lightweight aircraft-quality wrist pins, and double spirolox locks. The ring groove sizes are 1.5, 1.5, and 3mm.

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

BrandHowards Cams
Part Number840425205
CategoryEngines and Components

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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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