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Engines and Components› Engines, Blocks and Components

ATK High Performance

489CI Chevy Base Engine

$10,980.00 $8,635.99 Save $2,344.01

SKU: HP411P

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The ATK High Performance HP411P is a Chevy 489CI base engine designed for high performance applications. It features a seasoned OE 4-bolt main Gen V block from 1991-1995, capable of up to a 4.310” bore and 4.250” stroke, resulting in a 489 cubic inch displacement.

This engine is equipped with a Scat nodular iron crankshaft, Scat 4340 forged I-beam connecting rods with ARP bolts, and forged pistons for a 10.1:1 compression ratio. It includes a hydraulic roller camshaft with specific lift and duration specs, a double-roller timing chain, and ATK HP aluminum cylinder heads. The package is completed with billet aluminum roller rocker arms and a Moroso 6-quart street/strip oil pan.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandATK High Performance
Part NumberHP411P
CategoryEngines and Components

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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