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Parts intended for competition use only*
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Proposition 65 Warning*
A Chevrolet Performance Parts Circle Track Crate Engine

Select Circle Track Engines now available

The Sure Shot
Locate a Dealer
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Parts intended for competition use only*
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Proposition 65 Warning*
A Yellow Horsepower Icon

Factory-Sealed

For Competition Use
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Up to

533 hp

Horsepower
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Up to

477 lb.-ft.

Torque

Circle Track Engines

  • CT350

    View Engine

    The 602 loves to find the sweet spots in every gear.
    A Chevrolet Performance Parts CT350 Crate Engine

    View Engine

    The 602 loves to find the sweet spots in every gear.
    fpo

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    350 hp @ 5,400 rpm

    Torque:

    396 lb.-ft. @ 3,800 rpm

    Max Rec RPM:

    5,500

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder metal, shot peened

    Pistons:

    Hypereutectic aluminum

    Intake Manifold:

    Dual-plane aluminum

    Camshaft Type:

    Hydraulic flat tappet

    Rocker Arms:

    Stamped steel

    Engine Basics

    Part Number:

    19434602

    Engine Type:

    Chevy Small-Block V8

    Displacement:

    350 cu. in. (5.7L)

    Block:

    Cast iron with 4-bolt main caps

    Balanced:

    External

    Measurements

    Bore x Stroke:

    4.000 in. x 3.480 in.

    Valve Lift (in):

    .435 intake / .460 exhaust

    Camshaft Duration (@ .050 in):

    212° intake / 222° exhaust

    Compression Ratio:

    9.6:1

    Rocker Arm Ratio:

    1.5:1

    Cylinder Head and Valves

    Cylinder Heads:

    Vortec iron; 62cc chambers

    Valve Size (in.):

    1.940 intake / 1.500 exhaust

    Fuel and Ignition

    Ignition Timing:

    34° Total @ 4,000 rpm

    Recommended Fuel:

    Premium pump

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    350 hp @ 5,400 rpm

    Torque:

    396 lb.-ft. @ 3,800 rpm

    Max Rec RPM:

    5,500

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder metal, shot peened

    Pistons:

    Hypereutectic aluminum

    Intake Manifold:

    Dual-plane aluminum

    Camshaft Type:

    Hydraulic flat tappet

    Rocker Arms:

    Stamped steel

    Engine Basics

    Part Number:

    19434602

    Engine Type:

    Chevy Small-Block V8

    Displacement:

    350 cu. in. (5.7L)

    Block:

    Cast iron with 4-bolt main caps

    Balanced:

    External

    Cylinder Heads and Valves

    Cylinder Heads:

    Vortec iron; 62cc chambers

    Valve Size (in.):

    1.940 intake / 1.500 exhaust

    Measurements

    Bore x Stroke:

    4.000 in. x 3.480 in.

    Valve Lift (in):

    .435 intake / .460 exhaust

    Camshaft Duration (@ .050 in):

    212° intake / 222° exhaust 

    Compression Ratio:

    9.6:1

    Rocker Arm Ratio:

    1.5:1

    Fuel and Ignition

    Ignition Timing:

    34° Total @ 4,000 rpm

    Recommended Fuel:

    Premium pump
    View in 2025 Catalog

  • CT400

    View Engine

    The legendary 604 — built for competition use.
    A Chevrolet Performance Parts CT400 Crate Engine

    View Engine

    The legendary 604 — built for competition use.
    alt

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    404 hp @ 5,600 rpm

    Torque:

    406 lb.-ft. @ 4,600 rpm

    Max Rec RPM:

    5,800

    Internal Components

    Crankshaft:

    Forged steel, shot peened

    Connecting Rods:

    Forged powder metal, shot peened

    Pistons:

    Hypereutectic aluminum

    Intake Manifold:

    Single-plane aluminum

    Camshaft Type:

    Steel hydraulic roller

    Rocker Arms:

    Aluminum, roller style

    Engine Basics

    Part Number:

    19434604

    Engine Type:

    Chevy Small-Block V8

    Displacement:

    350 cu. in. (5.7L)

    Block:

    Cast iron with 4-bolt main caps

    Balanced:

    External

    Measurements

    Bore x Stroke:

    4.000 in. x 3.480 in.

    Valve Lift (in):

    .474 intake / .510 exhaust

    Camshaft Duration (@ .050 in):

    208° intake / 221° exhaust

    Compression Ratio:

    9.7:1 nominal

    Rocker Arm Ratio:

    1.5:1

    Cylinder Head and Valves

    Cylinder Heads:

    Fast Burn aluminum; 62cc chambers

    Valve Size (in.):

    2.000 intake / 1.550 exhaust

    Fuel and Ignition

    Ignition Timing:

    36° Total @ 4,000 rpm

    Recommended Fuel:

    Premium pump

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    404 hp @ 5,600 rpm

    Torque:

    406 lb.-ft. @ 4,600 rpm

    Max Rec RPM:

    5,800

    Internal Components

    Crankshaft:

    Forged steel, shot peened

    Pistons:

    Hypereutectic aluminum

    Intake Manifold:

    Single-plane aluminum

    Camshaft Type:

    Steel hydraulic roller

    Rocker Arms:

    Aluminum, roller style

    Engine Basics

    Part Number:

    19434604

    Engine Type:

    Chevy Small-Block V8

    Displacement:

    350 cu. in. (5.7L)

    Block:

    Cast iron with 4-bolt main caps

    Balanced:

    External

    Cylinder Heads and Valves

    Cylinder Heads:

    Fast Burn aluminum; 62cc chambers

    Valve Size (in.):

    2.000 intake / 1.550 exhaust

    Measurements

    Bore x Stroke:

    4.000 in. x 3.480 in.

    Valve Lift (in):

    .474 intake / .510 exhaust

    Camshaft Duration (@ .050 in):

    208° intake / 221° exhaust

    Compression Ratio:

    9.7:1 nominal

    Rocker Arm Ratio:

    1.5:1

    Fuel and Ignition

    Ignition Timing:

    36° Total @ 4,000 rpm

    Recommended Fuel:

    Premium pump
    View in 2025 Catalog

  • CT525

    View Engine

    A powerful choice that's built to last — LS engine designed for competition use.
    A Chevrolet Performance Parts CT525 Crate Engine

    View Engine

    A powerful choice that's built to last — LS engine designed for competition use.
    alt

    Tech Specs
    View in 2025 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:

    19434598

    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

    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

    Tech Specs

    Performance

    Horsepower:

    533 hp @ 6,600 rpm

    Torque:

    477 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,700

    Internal Components

    Crankshaft:

    Forged steel, shot peened

    Connecting Rods:

    Powder metal with ARP bolts

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19434598

    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 2025 Catalog

Product Spotlight

Circle Track
Crate Engines

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Racing Articles

Dive into the Chevrolet Performance Parts racing community.
An Orange, Blue, and Yellow Racecar Blazes Down a Racetrack

Out of the Box Racing:

The Mid-East 602 Late Models
tbd

CT525 Champion Driver
Al Hejna
tbd

High-Revving Performance
Inside the CT400
An Orange, Blue, and Yellow Racecar Blazes Down a Racetrack

Out of the Box Racing:

The Mid-East 602 Late Models
tbd

CT525 Champion Driver
Al Hejna
tbd

High-Revving Performance
Inside the CT400
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tbd

Sights from the 2024 Charlotte Roval Weekend

The BLOCK | Chevrolet
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Build confidently with Chevrolet Performance installation guides.

CT350

CT400

CT525

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