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ATK HP116C-EFI Chevy LM7 5.3L 500HP with FiTech EFI Crate Engine

$275 Shipping

#35020255

ATK HP116C-EFI Chevy LM7 5.3L 500HP with FiTech EFI Crate Engine

500 HP
440 TQ
OE LM7/5.3L Iron Block

Level Of Dress:

#2 Complete Dress - EFI

$9,199.99

/each

Factory Shipped

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Product Summary

Long Block Crate Engine Type, 10.0:1 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	10.0:1
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 35020255 Details

The ATK HP116C-EFI Chevy LM7 5.3L crate engine is a powerful 500 horsepower, 440 lb-ft torque setup built on a durable OE LM7 iron block with a 3.903" bore and 3.622" stroke, resulting in 347 cubic inches of displacement. It features an OE GM 24-tooth reluctor wheel crankshaft, powder metal connecting rods, and hypereutectic 10:1 compression pistons with moly rings for durability. The valvetrain includes a custom performance hydraulic roller camshaft, OE 1.7 ratio rocker arms, and AFR CNC-ported aluminum cylinder heads with 59cc combustion chambers and 200cc intake runners for optimized airflow. This package includes a FiTech Ultra Port Injection LS1 750HP EFI system with 55lb fuel injectors, transmission control, wiring harness, and ECM/TCM, providing modern fuel delivery and management. It also comes with a Melling M295 oil pump, Autolite #104 spark plugs, and 8mm plug wires, making it an ideal choice for high-performance street or strip builds requiring 91+ octane fuel, a 2200+ stall converter, and 1 5/8" or larger headers.

500 HP
440 TQ
OE LM7/5.3L Iron Block
3.903” x 3.622 Bore/Stroke
347 ci Displacement
OE GM 24 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 Rocker Arms
Melling M295 Oil Pump
FITECH Ultra port injection LS1 750HP with transmission control (wiring harness & ECM/TCM included) EFI System
FITECH 55lb Fuel Injectors
Autolite #104 Spark Plugs
8mm Spark Plug Wires
Stock internally balanced Balancer

Application

Designed for 1999-2020 Chevy Applications.

Specs

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

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 35020255 Specifications

KEY SPECS
MFG. Part #	35020255
Brand	ATK Engines
Crate Engine Type	Long Block
Compression Ratio	10.0:1
Engine Displacement	347 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Piston Material	Hypereutectic Aluminum
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	No
Connecting Rod Material	Powdered Metal
Valve Covers Included	Yes
Engine Balance	Internal
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Throttle Body Included	Yes
Timing Cover Included	Yes
Oil Pan Included	Yes
Water Pump Included	No
Harmonic Balancer Included	Yes
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	Yes
Spark Plug Wires Included	Yes
Computer Included	No
Wiring Harness Included	No
Recommended Fuel	91 Octane

GENERAL
Torque	440 ft./lbs.
Horsepower	500 horsepower
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	00653517731570
Sold in Quantity	Each

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Questions & Answers

1 Question • 1 Answer

Sort Questions

What RPM is the power band in also what is the peak RPM on the torque? Need the numbers Man come on

by Rich

• 4 months ago

1 answer

View Answer

1 of 1 questions shown

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