GM LM7 383 ENG 540HP BASE

Name: GM LM7 383 ENG 540HP BASE
Brand: ATK ENGINES
SKU: A040 LM7-LB-4
Price: 9763.92 USD
Availability: InStock

$9,763.92

SKU: A040 LM7-LB-4

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Ships in 4–6 weeks

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Professional / shop required

Description

The ATK ENGINES LM7-LB-4 is a Chevy LM7/LS1 383CI Base Engine producing 540HP+. It is based on an LM7 (Iron LS1/LS6) block with custom AFR CNC Ported heads. This engine can replace the 1999-2007 Chevy 5.3L LM7 engine with supporting modifications or any other factory LS equipped vehicle. ECM tuning is required for optimal performance and to prevent engine damage.

Fitment

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Specifications

Brand	ATK ENGINES
Part Number	A040 LM7-LB-4

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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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