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hp @ 5000 rpm

Chevrolet Performance’s most economical Circle Track crate engine

Chevrolet Performance’s CT350 delivers 350 horsepower from a classic 350 cubic-inch combination. It’s just the thing budget-conscious racers can depend on for competitive performance and low-maintenance durability.

The CT350 is based on the popular 350 HO high-performance street crate engine, including a stout four-bolt main block and Vortec-style iron cylinder heads. The Vortec heads and unique dual-pattern camshaft help deliver more than 300 lb-ft of torque at 2000 rpm and hold it above that mark through 5500 rpm — it peaks at 390 lb-ft at 3800 rpm. With that much pulling power, you can hold a gear longer, keeping the engine in its sweet spot for quicker laps.

We complete the CT350 with an 8-quart Circle Track racing oil pan, balancer, HEI distributor, and an aluminum high-rise, dual-plane intake manifold. Add your carburetor, starter, spark plugs, wires, and water pump — all available at chevroletperformance.com — and you’ll be ready to roll into the winner’s circle!


Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.


Part Number:
Engine Type:
Chevy Small-Block V-8
Displacement (cu. in.):
Bore x Stroke (in.):
4.000 x 3.480
Block (P/N 10105123):
Cast-iron with four-bolt main caps
Crankshaft (P/N 10243068):
Nodular iron
Connecting Rods (P/N 10108688):
Powdered metal steel
Pistons (P/N 94672680):
Hypereutectic aluminum
Camshaft Type (P/N 24502476):
Hydraulic flat tappet
Camshaft Lift (in.):
.435 intake / .460 exhaust
Camshaft Duration (@.050 in.):
212° intake / 222° exhaust
Cylinder Heads (P/N 12558060):
Vortec iron; 64-cc chambers
Valve Size (in.):
1.940 intake / 1.500 exhaust
Compression Ratio:
9.12 nominal
Rocker Arms (P/N 10089648):
Stamped steel
Rocker Arm Ratio:
Recommended Fuel:
92 octane
Ignition Timing:
Base 10° BTDC, 32° Total
Maximum Recommended rpm:


Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

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    • Requires addition of carburetor, starter, water pump, plug wires, and exhaust system (not included)

    • Requires an externally balanced flywheel (not included)

    • The 8-quart Circle Track oil pan is 8 inches deep at the sump. It will clear most GM rear-steer chassis with stock engine location

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Download a catalog for a full listing of components and related parts.

Water Pump, Long-Style • P/N 88894341

Fuel Pump, Street Performance • P/N 12355612

High-Torque Mini-Starter • P/N 12361146

Carburetor, Holley 670-cfm • P/N 19170092

Air Cleaner, Classic Design • P/N 12342071

Spark Plug Wire Set • P/N 24502521

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.

Destination Freight Charges

To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.