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ATK HP116-G4 Chevy 500HP LM7 GEN IV 5.3L Crate Engine

$275 Shipping

#35020248

ATK HP116-G4 Chevy 500HP LM7 GEN IV 5.3L Crate Engine

500 HP
440 TQ
OE LM7/5.3L Iron Block

$5,359.99

/each

Factory Shipped

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Product Summary

Long Block Crate Engine Type, 10.1:1 Compression Ratio

500 HP
440 TQ
OE LM7/5.3L Iron Block
3.903” x 3.622 Bore/Stroke
347 ci Displacement

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Key Specs

Crate Engine Type	Long Block
Compression Ratio	10.1:1
Engine Displacement	347 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum

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Made to Order

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ATK Engines 35020248 Details

The ATK HP116-G4 Chevy 500HP LM7 GEN IV 5.3L base engine is a high-performance build capable of producing 500 horsepower and 440 lb-ft of torque, based on an OE LM7 5.3L iron block with a 3.903" bore and 3.622" stroke, resulting in 347 cubic inches of displacement. It features an OE GM 58-tooth reluctor wheel crankshaft, OE powder metal connecting rods, and hypereutectic pistons with a 10.1:1 compression ratio, paired with moly rings for durability. The valvetrain includes a custom performance hydraulic roller camshaft, OE 1.7 ratio rocker arms with trunnion upgrades, and AFR CNC-ported aluminum cylinder heads with 59cc combustion chambers and 200cc intake runners for optimal airflow. It is equipped with a Melling M295 oil pump and is designed for use with 36lb injectors, LS-style EFI intake manifolds, and 1 5/8" or larger headers. The engine requires 91+ octane fuel, a 2200+ stall converter, and ECM tuning for peak performance.

500 HP
440 TQ
OE LM7/5.3L Iron Block
3.903” x 3.622 Bore/Stroke
347 ci Displacement
OE GM 58 tooth reluctor wheel Crankshaft
OE powder metal Rods
Hypereutectic 10.1 compression Pistons
Moly Rings
Hyd. Roller Camshaft
Custom performance grind Cam Specs
OE single roller Timing Chain
AFR CNC ported aluminum 59cc/200cc 2.000”in/1.570”ex Cylinder Heads
OE 1.7 ratio with trunnion upgrade Rocker Arms
Melling M295 Oil Pump

Application

This engine can replace the Gen IV Chevy 4.8/5.3/6.0L engines with proper upgrades. ECM MUST BE TUNED and injectors must be upgraded; not doing so can damage the engine.

Specs

Conventional / Non Synthetic 10W30 Oil
Wix or K&N Oil Filter
Set to factory specifications via PCM module (ECM TUNING REQUIRED) Timing
.040” Spark Plug Gap
18726543 Firing Order
91+ Octane
2200+ Stall Converter
1 5/8+ Headers Exhaust

Guides & Documents

Warranty (ATK Engines)

Technical Information (ATK Engines)

Warranty Information

Warranty claims must be filed with the manufacturer in accordance to their policies.

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

ATK Engines 35020248 Specifications

KEY SPECS
MFG. Part #	35020248
Brand	ATK Engines
Crate Engine Type	Long Block
Compression Ratio	10.1:1
Engine Displacement	347 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Piston Material	Hypereutectic Aluminum
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Connecting Rod Material	Powdered Metal
Valve Covers Included	No
Engine Balance	Internal
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Throttle Body Included	No
Timing Cover Included	No
Oil Pan Included	No
Water Pump Included	No
Harmonic Balancer Included	No
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	No
Spark Plug Wires Included	No
Computer Included	No
Wiring Harness Included	No
Reluctor Wheel	58x

GENERAL
Torque	440 ft./lbs.
Horsepower	500 horsepower
Combustion Chamber Volume	59cc
Camshaft Duration (.050 in)	218° intake / 226° exhaust
Camshaft Lift (in)	.543 intake / .554 exhaust
Bore x Stroke (in)	4.060" x 3.000"
GTIN Code	00653517734427
Notes	This engine can replace the Gen IV Chevy 4.8/5.3/6.0L engines with proper upgrades. ECM MUST BE TUNED and injectors must be upgraded; not doing so can damage the engine.
Sold in Quantity	Each

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