Engines and Components› Engines, Blocks and Components

ATK ENGINES

GM LM7 347 ENG 500HP BASE

$8,591.67

SKU: A040 LM7-LB-2

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The ATK ENGINES LM7-LB-2 is an LM7 (Iron LS1/LS6) based engine with CNC Ported Cathedral Port Aluminum heads, delivering 500HP+. It features big mid to upper-end power and a noticeable idle. Optimal performance requires headers, TBSS intake, larger throttle body, chassis dyno tune, and 36lb injectors.

Fitment

Fitment Guaranteed

Don’t gamble
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.

Available on iOS & Android

Specifications

BrandATK ENGINES
Part NumberA040 LM7-LB-2

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.

View Full Return Policy