Engines and Components› Cylinder Heads and Components

ATK ENGINES

LS1 61CC/250CC ALUM HIGH PERF HEAD

$1,158.34

SKU: A040 HPLS1250

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Description

The ATK ENGINES HPLS1250 is a performance cylinder head designed for GM Gen III/IV LS engines with LS1/LS6 cathedral ports. It features a 61cc combustion chamber, 250cc intake port, and 105cc exhaust port. This head uses 2.080" intake and 1.60" exhaust stainless steel valves and Pac 1905 dual valve springs, supporting up to .650" hydraulic roller camshaft lift. Made from A356 aluminum, it requires a minimum bore of 3.900" and is sold individually.

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Specifications

BrandATK ENGINES
Part NumberA040 HPLS1250

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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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