Engines and Components› Engines, Blocks and Components

ATK ENGINES

CUMMINS QSB 6.7 DROP-IN

$20,425.00

SKU: A040 HMY7

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

The ATK HP97 is a 385HP Chevy LM7 5.3L base engine designed for 1999-2007 trucks and suitable for LS swaps. It features a seasoned OE LM7/5.3L iron block, OEM GM 24 tooth reluctor wheel crankshaft, stock GM rods, hypereutectic 9.5:1 compression pistons, moly rings, and custom performance grind hydraulic roller camshaft. The cylinder heads are OE aluminum with 61.15cc and 1.89”/1.55” valves, utilizing OE powdered metal 1.7 ratio rocker arms. This engine provides 385 horsepower and 390 ft-lbs of torque.

Fitment

Fitment Guaranteed

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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 ENGINES
Part NumberA040 HMY7

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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