HP97 High Performance Crate Engine GM LM7 5.3L [385 HP/390 TQ]

Name: HP97 High Performance Crate Engine GM LM7 5.3L [385 HP/390 TQ]
Brand: ATK ENGINES
SKU: 059-HP97
Price: 3999.00 USD
Availability: InStock

^$3,999⁰⁰

Core Charge: ^$285⁰⁰

Truck Freight

Ships Today

Lowest Price Guarantee

LS 5.3L Crate Engine

High Performance Crate Engine

GM LM7 (LS) 5.3L

Horsepower: 385

Torque: 390

Bore/Stroke: 3.809 in./3.622 in.

Block: Cast-Iron

Cylinder Heads: Aluminum

Crankshaft: Internally Balanced, 24 Tooth Reluctor Wheel w/.857 in. Flange

ATK HP97 High Performance Crate Engine:

Horsepower: 385
Torque: 390
Block: GM 5.3L iron LM7
Bore/stroke: 3.809 x 3.622
Year Range: 1999-2007
Displacement: 323 c.i.
Crankshaft: OEM GM 3.622 in. stroke internally balanced 24 tooth reluctor wheel .857 in. flange
Connecting rods: OE GM forged powder metal 6.093 in. stock bolts
Pistons: Hypereutectic dish
Piston rings: Moly
Compression ratio: 9.5:1
Camshaft: Hydraulic roller
Camshaft specifications: Custom grind
Camshaft bearings: Installed and clocked to OEM position
Cylinder heads: OE aluminum 61.15cc w/1.89/1.55 in. valves
Freeze plugs: Brass installed and sealed
Rocker arms: OE powdered metal 1.7 ratio
Oil Galley plugs: Installed and sealed
Weight: 385 lbs.

FAQ

Is it better to buy a crate engine or rebuild?

It depends on specific needs. Crate engines like the ATK HP97 offer convenience, while rebuilding allows customization.
Crate engines save time, while rebuilds offer tailored performance.

How much horsepower can you get out of a 5.3 LS?

With modifications, a built 5.3 LS engine, such as the ATK 5.3, can reach over 400-500 horsepower reliably.
Performance upgrades enhance the 5.3's power potential.

Which GM LS engine has the most horsepower?

The L33 crate engine is among the powerful LS engines, delivering impressive horsepower and torque.
Its stock form offers robust performance for various applications.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Please CLICK HERE for ATK Warranty

High-Performance Replacement Engine for LS-Based Trucks, Vans & SUV's

In 2007, ATK launched a High-Performance Division with one of the finest engine shops in the country. By reverse engineering all of their engines, they are able to eliminate any OEM deficiencies. This makes an ATK built crate engine have a superior design over the original engine by incorporating better components when needed. These quality built engines are offered in three different stages for ease of finishing an engine swap. ATK HP engines feature a 24 month/unlimited mile warranty.

Engine Specifications

This engine was designed to be a performance upgrade for LS based vehicles or perfect for a swap in a hot rod. For optimal performance you will need headers, chassis dyno tune, and upgraded injectors.

Horsepower: 385 hp
Torque: 390 lb/ft

Block Information: