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Chevrolet Performance 19258602 CT350 IMCA-Seal 602 Chevy Crate Engine
Chevrolet Performance 19258602 CT350 IMCA-Seal 602 Chevy Crate Engine

Chevrolet Performance 19258602 CT350 IMCA-Seal 602 Chevy Crate Engine

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Chevrolet Performance 19258602 CT350 IMCA-Seal 602 Chevy Crate Engine
Chevrolet Performance 19258602 CT350 IMCA-Seal 602 Chevy Crate Engine
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Part # 91019258602
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  • This item 91019258602 is made to order. It will be shipped from our warehouse when it is produced.


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:
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! 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!
  • Track-tested durability
  • Great mid-range power
  • Best horsepower value around
  • 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
*Check track rules for correct application. To order the GM-sealed version of this engine, click here.
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" & dynoed 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.


All GM Performance Parts racing crate engines are excluded from the limited warranty.
Some parts are not legal for use in California or other states with similar laws/regulations

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