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GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine, Dyno Tested
GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine, Dyno Tested

GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine, Dyno Tested

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GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine, Dyno Tested
GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine, Dyno Tested
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Part # 91619258602
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350 horsepower
390 ft./lbs.
Maximum RPM:
Engine Displacement:
350 cu. in.
Crate Engine Type:
Deluxe Crate Engine
Camshaft Type:
Hydraulic Flat Tappet
Cylinder Head Material:
Cast Iron
Piston Material:
Hypereutectic Aluminum
Crankshaft Material:
Cast Iron
Carburetor Included:
Intake Manifold Included:
Distributor Included:
MFG. Part #:
Connecting Rod Material:
Powdered Metal
Sold in Quantity:
Broke-in, dyno-verified HP/TQ, and IMCA-sealed for competition.
Valve Covers Included:
Cylinder Heads Included:
Rear Main Seal Style:
Oil Pan Included:
Timing Cover Included:
Water Pump Included:
Harmonic Balancer Included:
Flexplate Included:
Spark Plugs Included:
Spark Plug Wires Included:


The Chevrolet Performance CT350 circle track crate engine delivers competitive and durable power at an economical price, and now Speedway Motors Racing Engines is offering them as a dyno-verified package that is ready to race! Designed for circle track's weekend warriors, this bullet-proof 350-horsepower, 350-cubic-inch IMCA-sealed racing crate engine (often referred to as the "602 crate") is a tough combination of power and reliability – and it fits almost any racing budget.
Based on GM Performance Parts' popular 350 HO engine, including a brand-new, four-bolt-main block, 9:1 hypereutectic pistons, cast iron crankshaft and GM iron Vortec cylinder heads, the 350/350 Factory Stock version features a high-rise dual-plane intake manifold, 8-quart single kick-out circle track oil pan, valve cover kit with breather tube and breather, and special "kool nut" rocker arm nut design. The 350 HO's unique dual-pattern cam is included, too. It's based on the one found in 1965-67 Corvette 327 engines, but with more lift and duration to clear the engine exhaust quickly and move in more air – providing excellent mid- and high-range power, where you need it on the track.
The 602 crate engine is delivered complete from the oil pan to the intake manifold – including an HEI distributor – the 350/350 CT350 racing crate engine has the proven parts and horsepower to enable a competitive racecar. Getting it into the winner's circle, however, is your job!
  • Dyno-verified horsepower and torque
  • Camshaft and piston rings are broken-in using a proprietary dyno program
  • Lash and timing are individually tuned
  • Engine is ready to race
  • Comes sealed with IMCA issued bolts and is approved for use in IMCA
  • Popular in Hobby Stock, Factory Stock, Street Stock, Sport Modified, and Truck classes*


  • 350 HP @ 5000 RPM, 390 ft. lbs. of torque @ 3800 RPM
  • Bore x Stroke: 4.00” x 3.48”
  • Compression Ratio: 9.1:1
  • 92 Octane recommended fuel
  • Cast Iron, 4-bolt main caps
  • Cam Lift: .435” Intake / .460” exhaust
  • Cam Duration @ .050”: 212 deg. Intake / 222 deg. Exhaust
  • Lobe Separation: 112.5 Degree
  • 1.94” Intake/ 1.50” Exhaust valves
  • Stamped Steel, 1.5:1 Ratio rocker arms
  • Engine weighs 434 lbs. as delivered
  • Fully GM assembled long block
  • Steel Valve Covers w/ Chevy Bowtie Logo Breathers
  • High Rise Aluminum Intake Manifold
  • HEI Distributor
  • 8” Harmonic Balancer
  • Oil pump, pick-up and 8 quart oil pan
  • Front timing cover
  • IMCA-issued bolts
  • Dyno sheet of your engine
*Check track rules for correct application.
Be sure to check out our tech article Legal Upgrades for 602/604 Crates to get the most out of your new crate engine.


  1. Requires the addition of a carburetor, starter, water pump, spark plugs, and plug wires (not included). See 121-8602 for a "dressed" version of this engine.
  2. Requires an externally balanced flywheel (not included).
  3. The 8-quart Circle Track oil pan is 8 inches deep at the sump. It will clear most GM rear-steer chassis with the stock engine location.
  4. For Circle Track Racing only - not intended for street use.
Some parts are not legal for use in California or other states with similar laws/regulations

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