Engines and Components› Engines, Blocks and Components

ATK ENGINES

HEMI 5.7L GEN III 400HP

$5,534.85

SKU: A040 HP103T

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 HP103T is a high-performance crate engine designed for 2003-2008 Chrysler, Dodge, and Ram vehicles with the Gen III HEMI 5.7L (345ci) engine. This engine delivers 400 horsepower and 400 lb/ft of torque, specifically for Non-MDS (Multi-Displacement System) applications, with MDS holes plugged. An ECM tune is required for proper operation.

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 HP103T

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