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OFF-ROAD
ENGINES

OFF-ROAD ENGINES

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Parts intended for competition use only*
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A Chevrolet Performance Parts RLB Engine

COMING SOON: ALL-NEW LSX454 RLB

Spec-Based, Off-Road Racer

Spec-Based, Off-Road Racer

Competitive, tough and durable off-road racing engines featuring long block adaptations of legendary Chevrolet Performance Crate Engines — and coming soon, the LSX454 RLB joins the Off-Road Engine Family.

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Parts intended for competition use only*
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Proposition 65 Warning*
A Yellow Horsepower Icon

Up to

7,100

Max Rec RPM
Two Yellow Gears Slightly Apart with an Arrow Pointing at a Curve from the Left One to the Other

Up to

533 hp

Horsepower*
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Up to

477 lb.-ft.

Torque*
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Up to

376 (6.2L)

Displacement

Off-Road Engine

  • LSX454 RLB Off-Road Race Engine (Coming Soon)

    LSX454 RLB Off-Road Race Engine

    (Coming Soon)

    Off road racing just gained a powerful new competitor. Built on the legendary LSX  architecture, the upcoming LSX454 RLB crate engine is engineered to deliver elite performance and reliability in the harshest environments.

    Sign up to receive our emails and connect with us on social media for official product updates. Complete specifications, including finalized horsepower, torque, and the official dyno chart, will be revealed here at launch.

    coming soon

    Off road racing just gained a powerful new competitor. Built on the legendary LSX  architecture, the upcoming LSX454 RLB crate engine is engineered to deliver elite performance and reliability in the harshest environments.

    Sign up to receive our emails and connect with us on social media for official product updates. Complete specifications, including finalized horsepower, torque, and the official dyno chart, will be revealed here at launch.

    tbd
    Sign Up
    Sign Up

  • 525 RLB

    View Engine

    CT525 designed for off-road competition use.

    A Chevy Performance Parts 525 RLB Crate Engine

    View Engine

    CT525 designed for off-road competition use.

    tbd

    Tech Specs
    View in 2026 Catalog

    Performance

    Horsepower:

    533 hp @ 6,600 rpm

    Torque:

    477 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,700

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powder metal with ARP bolts

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19435005

    Engine Type:

    Gen IV Small-Block V8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.62 in. (103.25 x 92mm)

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1 nominal

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    LS3 rectangular port; aluminum as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust; stainless steel

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer
    View Installation Guide

    Tech Specs

    Performance

    Horsepower:

    533 hp @ 6,600 rpm

    Torque:

    477 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,700

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powder metal with ARP bolts 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19435005

    Engine Type:

    LS-Series Gen IV Small-Block V8 

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    LS3 rectangular port; aluminum as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust; stainless steel

    Measurements

    Bore x Stroke:

    4.065 in. x 3.62 in. (103.25 x 92mm)

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1 nominal 

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2026 Catalog
    View Installation Guide

Chevrolet Performance Powers Winners

From the mountains to the desert, Chevrolet Performance has been a longtime supporter of off-road racing — and our contingency program rewards racers running Chevy power under the hood.

How Jake Velasco Race Prep Uses LS Power in the Desert

Left View of a White Truck Off-Roading
Left Rear View of a White Chevy Off-Roading Truck with Tires Loaded in the Truck Bed
Inside View of a Chevy Off-Roading Truck
White Chevy Truck Off-Roading in the Desert
Front View of a White Chevy Off-Roading Truck with Black and Yellow Graphics
Explore Custom Build

Justin Davis Dominates in the Desert

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Off-Roading Team Standing Together in Front of Truck
Off-Roading Tents and RV Parked in the Desert
Members of Team Standing Around or Near AutoNation Parts Center
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Members of Off-Roading Team Standing Around AutoNation Parts Center Tent and RV
Explore Custom Build

Featured Event

The Mint 400: A Desert Challenge

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A Group of Off-Roading Trucks in the Desert
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Off-Roading Trucks Lined Up Inside a Performance Hall
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Build confidently with Chevrolet Performance installation guides.

525 RLB

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