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Parts intended for competition use only*

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A Chevrolet Performance Parts Circle Track Crate Engine

The Sure Shot

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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

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

View CT350

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

View CT350

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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Locate a Dealer

Tech Specs

Performance

Horsepower:

350 hp @ 5,400 rpm

Torque:

396 lb.-ft. @ 3,800 rpm

Max Rec RPM:

5,500

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

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

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

View in 2025 Catalog
CT400

The legendary 604 — built for competition use.

View CT400

The legendary 604 — built for competition use.

View CT400

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

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

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

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

View in 2025 Catalog
CT525

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

View CT525

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

View CT525

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

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

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

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

View in 2025 Catalog

alt

Product Spotlight

Circle Track
Crate Engines

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

#/#

alt

Sights from the 2024 Charlotte Roval Weekend

The BLOCK | Chevrolet

Build confidently with Chevrolet Performance installation guides.

CT350

CT400

CT525

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