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OFF-ROAD
ENGINES

OFF-ROAD ENGINES

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Parts intended for competition use only*
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Proposition 65 Warning*
A Chevrolet Performance Parts RLB Engine

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
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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

    LSX454 RLB Off-Road Race Engine

    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.

    View Engine

    coming soon

    View Engine

    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.
    tbd

    Tech Specs

    Performance

    Horsepower:

    TBD

    Torque:

    TBD

    Max Rec RPM:

    7,100

    Internal Components

    Crankshaft:

    4340 forged steel with 8-bolt flange

    Connecting Rods:

    4340 forged steel

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19543486

    Engine Type:

    Gen IV Small-Block V-8

    Displacement:

    454 (7.4L)

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.185 x 4.125 (106.3 x 104.8 mm)

    Valve Lift (in):

    .652 intake/.652 exhaust

    Camshaft Duration (@.050 in):

    242° intake/286° exhaust​

    Compression Ratio:

    11.0:1​

    Rocker Arm Ratio:

    1.8:1

    Cylinder Head and Valves

    Cylinder Heads:

    CNC port; aluminum as cast with 70cc chambers and 6-bolt attachment​

    Valve Size (in.):

    2.200 titanium intake/1.610 inconel exhaust​

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    TBD

    Torque:

    TBD

    Max Rec RPM:

    7,100

    Internal Components

    Crankshaft:

    4340 forged steel with 8-bolt flange​

    Connecting Rods:

    4340 forged steel

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19543377

    Engine Type:

    Gen IV Small-Block V-8

    Displacement:

    454 (7.4L)

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    CNC port; aluminum as cast with 70cc chambers and 6-bolt attachment​

    Valve Size (in.):

    2.200 titanium intake/1.610 inconel exhaust

    Measurements

    Bore x Stroke:

    4.185 x 4.125 (106.3 x 104.8 mm)​

    Valve Lift (in):

    .652 intake/.652 exhaust

    Camshaft Duration:

    242° intake/286° exhaust​

    Compression Ratio:

    11.0:1​

    Rocker Arm Ratio:

    1.8:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

  • 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:

    19543486

    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
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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
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Featured Event

The Mint 400: A Desert Challenge

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525 RLB

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