Engines and Components› Engines, Blocks and Components

ATK ENGINES

42RLE AUTO TRANS RWD/4WD

$3,458.34

SKU: A040 T151208

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In Stock
Ships by Jun 9
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The ATK SP78 LM7 383CI Short Block is designed for performance applications, featuring -15cc dished pistons and a 24-tooth reluctor wheel. It is compatible with vehicles originally equipped with the GM LM7 5.3L engine from 1999-2007. This short block includes a Manley 4340 forged crankshaft, Scat premium pro 4340 I beam rods, and Wiseco 2618 forged pistons.

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 T151208

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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