Product Summary

602, Deluxe Crate Engine Crate Engine Type

  • Dressed version includes spark plugs, spark plug wires, and oil filter adapter in addition to the GM supplied crate enigne
  • IMCA sealed and approved for use in IMCA
  • Dyno-verified horsepower and torque and will include a dyno sheet of your engine
  • Camshaft and piston rings are broke-in using a proprietary dyno program to ensure proper ring seal which increases horsepower
  • Lifter preload and timing are set prior to break in procedure for race ready performance right out of the crate

Key Specs

MFG. Part #88869602
BrandSpeedway Motors Racing Engines
Crate Engine TypeDeluxe Crate Engine
Engine Displacement350 cu. in.

Need To Know

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns

Return Policy


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 dressed & 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.

This dressed 602 crate engine is delivered complete from the oil pan to the intake manifold – including an HEI distributor, spark plugs & wires. 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
  • Includes ignition system
  • 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 at 5000 RPM, 390 ft. lbs. of torque at 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 at .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
  • Brisk LGS spark plugs
  • Moroso Ultra 40 plug wires, black, under-header (terminals installed)
  • 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 articleLegal Upgrades for 602/604 Cratesto get the most out of your new crate engine.


CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


MFG. Part #88869602
BrandSpeedway Motors Racing Engines
Crate Engine TypeDeluxe Crate Engine
Engine Displacement350 cu. in.
Horsepower350 horsepower
Compression Ratio9.1:1
Torque390 ft./lbs.
Maximum RPM5500
Camshaft TypeHydraulic Flat Tappet
Cylinder Head MaterialCast Iron
Piston MaterialHypereutectic Aluminum
Crankshaft MaterialCast Iron
Camshaft Duration (.050 in)212° intake / 222° exhaust
Camshaft Lift (in).435 intake / .460 exhaust
Bore x Stroke (in)4.000" x 3.480"
Carburetor IncludedNo
Intake Manifold IncludedYes
Distributor IncludedYes
Connecting Rod MaterialPowdered Metal
Valve Covers IncludedYes
Cylinder Heads IncludedYes
Rear Main Seal Style1-piece
Oil Pan IncludedYes
Timing Cover IncludedYes
Water Pump IncludedNo
Harmonic Balancer IncludedYes
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedYes
Spark Plug Wires IncludedYes
CNC-Machined Combustion ChamberNo
Intake StyleDual Plane
Camshaft IncludedYes
CNC-Machined RunnersNo
NotesBroke-in, dyno-verified HP/TQ, and IMCA-sealed for competition. Includes spark plugs & fitted wires.
Sold in QuantityEach