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Parts intended for competition use only*

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A Chevrolet Performance Parts Circle Track Crate Engine

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Parts intended for competition use only*

Proposition 65 Warning*

Factory-Sealed

For Competition Use

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

Up to

533 hp

Horsepower

A Yellow Speedometer Icon

Up to

477 lb.-ft.

Torque

Circle Track Engines

CT350

View Engine

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

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

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

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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.

View Engine

The legendary 604 — built for competition use.

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

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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.

View Engine

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

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

High-Revving Performance: Inside the CT400

High-Revving Performance: Inside the CT400

CT400 on a RaceTrack with the Team Near the Back

Aerial View of the CT400 Crate Engine

Aerial View of the CT400 on a Race Track

Vehicles Lined Up to Be Loaded Up into Storage Containers

View of Two Vehicles on a Race Track

Close Up on the Tire of a Racing Vehicle

CT525 Champion: Al Hejna

CT525 Champion: Al Hejna

Red Racing Vehicle on the Speedway Track

Left Rear View of a Race Car on a Dirt Track

A Race Car Driver Standing Next to His Daughter Who is Sitting in Front of a Shop

Race Car Driver Smiling in his Race Suit

A Race Car Making a Turn on a Dirt Track

Out of the Box Racing: The Mid-East 602 Late Models

Out of the Box Racing: The Mid-East 602 Late Models

Classic Chevrolet truck in industrial setting

Close-up of car engine components

Vintage car interior with steering wheel

Classic pickup truck parked near garages

Classic car dashboard with analog gauges

Build confidently with Chevrolet Performance installation guides.

CT350

CT400

CT525

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