Engines and Components› Engines, Blocks and Components

ATK ENGINES

GM RWD 4L60E 4SPD

$1,926.53

SKU: A040 1261AA-HJ

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
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Advanced — 4+ hours

Description

This ATK HP89 Chevy 350 Base Engine delivers 390HP and 420TQ, ideal for street performance with a noticeable idle. It is built with an OE roller block (1996-2000), 4-bolt main, and 1-piece rear main seal, featuring hypereutectic pistons, hydraulic roller camshaft, and ATK HP aluminum cylinder heads for reliable power.

Fitment

Fitment Guaranteed

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on fit.

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 ENGINES
Part NumberA040 1261AA-HJ

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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