602 Crate Engine – Chevrolet Performance CT350/602 Circle Track Crate Engine


  • 350 hp @ 5,400 rpm/396 lb.-ft. @ 3,800 rpm
  • Circle Track Factory Stock “GM 602” Engine
  • For Circle Track Racing only – NOT intended for street use
  • Comes with GM anti-tamper and IMCA seals installed

Shipping is free, but there is a delivery fee for residential addresses.

602 Crate Engine

The CT350 by Chevrolet Performance is the powerful, durable and affordable IMCA legal engine that budget-conscious racers can depend on! It’s a perfect fit for a large number of short track racers, offering both race-winning performance and low maintenance.

This Chevy race engine is designed for circle track use in the IMCA Sport Mod and Hobby Stock classes. It features a strong four-bolt main block and iron Vortec cylinder heads. A unique dual-pattern camshaft helps deliver more than 300 lb.-ft. of torque between 2,000 and 5,500 rpm peaking at 396 lb.-ft. at 3,800 rpm. With that much pulling power, you can hold a gear longer, keeping the engine in its sweet spot for quicker laps.

GM assembles the CT350 Sealed 602 with an 8-quart circle track racing oil pan, balancer, HEI distributor and an aluminum high-rise, dual-intake manifold. Add your carburetor, starter, spark plugs, wires and water pump as well as GM’s anti-tamper bolts to seal it up. IMCA seals added at our location to legalize it for IMCA Crate classes. Engine ships with IMCA stamped seals installed.

What’s Included

Based on the popular 350 HO high-performance street crate engine, the CT350 has the following features:

  • Four-bolt-main block
  • Iron Vortec cylinder heads
  • A unique dual-pattern camshaft.
  • 8-quart circle track racing oil pan
  • HEI distributor
  • Aluminum high-rise, dual-plane intake manifold

With 350 hp and 396 lb. feet of torque at 3,800 rpm, you can hold gears longer, keeping the engine in its sweet spot for quicker laps. Add a carburetor, starter spark plugs, wires, and water pump, all available from Karl Kustoms, and you’ll be ready for the green flag!

Important Notes

  • 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 “Factory Stock” oil pan (P/N 25534353) is 8 inches deep at the sump and will clear most GM rear-steer chassis with stock engine location
  • Get the most out of your engine with dyno tuning from the Karl Performance professionals – call for details
  • For Circle Track Racing only – NOT intended for street use
  • Distributor (P/N 93440806) included with CT 350 engine has a melonized steel gear (P/N 10456413) that MUST be used with engines with steel camshafts, or engine damage will occur.
  • This part replaces old P/N 19258602, P/N 19318602, P/N 19418602, P/N 88869602, and P/N 19370602 and P/N 19418602 and P/N 19431602

19258602, 19318602, 19370602, 19418602, 19431602, 19432602, 88869602


602 Circle Track/CT350 Tech Specs

  • Engine Type: Chevy Small-Block V-8
  • Displacement (cu in): 350
  • Bore x Stroke (in): 4.000 x 3.480
  • Block: Cast-iron with 4-bolt main caps (P/N 10105123)
  • Crankshaft: Nodular iron (P/N 10243068)
  • Connecting Rods: Powdered metal steel (P/N 10108688)
  • Pistons: Hypereutectic aluminum (P/N 94672680)
  • Camshaft Type: Hydraulic flat tappet (P/N 24502476)
  • Camshaft Lift (in): .435 intake /.460 exhaust
  • Camshaft Duration (@.050 in): 212° intake / 222° exhaust
  • Cylinder Heads: Vortec iron; 64cc chambers (P/N 12558060)
  • Valve Size (in): 1.940 intake /1.500 exhaust
  • Compression Ratio: 9.12:1 Nominal
  • Rocker Arms: Stamped steel (P/N 10089648)
  • Rocker Arm Ratio: 1.5:1
  • Recommended Fuel: Premium Pump
  • Ignition Timing: 34° Total @ 4,000 rpm
  • Maximum Recommended rpm: 5,500
  • Balanced: External

Dyno Chart



Click here to download installation information.

Race engines do not have any warranty


Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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