Product Summary

604, Deluxe Crate Engine Crate Engine Type

    Key Specs

    MFG. Part #88869604
    BrandSpeedway Motors Racing Engines
    Crate Engine TypeDeluxe Crate Engine
    Engine Displacement350 cu. in.

    Need To Know

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    Run up front with the 400-horsepower CT400 crate engine (often referred to as the "604 crate") featuring Fast Burn heads from GM Performance Parts. Now, Speedway Motors Racing Engines is offering this 604 crate engine as a dyno-verified package that is ready to race!
    These GM-sealed 604 crate engines are based on the popular Fast Burn 385 street crate engine, but include a racing-only 8-quart circle track oil pan with dual kick-out design, along with a valve cover breather kit and special "kool nut" rocker arm design. The assembly also includes an open-plenum high-rise intake manifold and 1.5:1-ratio aluminum roller rockers.
    The 604 crate engine includes a bulletproof bottom end, anchored by a forged steel crankshaft and hypereutectic pistons. The 23-degree, Fast Burn aluminum heads enable tremendous power in the small-block V-8 because of a unique chamber design that quickly and completely burns all of the air/fuel mixture – giving you maximum power. With the CT400 racing engine under the hood of your Modified or Late Model, you'll put a "fast burn" on the competition.
    • Dyno-verified horsepower and torque
    • Piston rings are broken-in using a proprietary dyno program
    • Lash and timing are individually tuned
    • Engine is ready to race, right out of the crate
    • GM-sealed for equal competition
    • Popular in Modified and Late Model classes*
    • 400 HP 5500 RPM
    • 400 ft. lbs. of torque 4500 RPM
    • 4.00" x 3.48" bore x stroke
    • 9.6:1 compression ratio
    • 92 octane recommended fuel
    • 4-bolt main caps
    • Cam lift: .474" intake / .510" exhaust
    • Cam duration .050": 208° intake / 221° exhaust
    • 112° lobe separation
    • 1.5:1 ratio aluminum roller rocker arms
    • 2.00" Intake / 1.55" Exhaust valves


    • Fully assembled long block
    • Black steel valve covers w/ breathers
    • Oil pump, pick-up, 8 quart oil pan
    • Eliminator Vortec intake manifold
    • Spark plugs
    • 8" harmonic balancer
    • Front timing cover
    • GM seals
    • Dyno sheet of your engine
    *Check track/series rules for approved applications.

    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 #88869604
    BrandSpeedway Motors Racing Engines
    Crate Engine TypeDeluxe Crate Engine
    Engine Displacement350 cu. in.
    Horsepower400 horsepower
    Compression Ratio9.72:1
    Torque400 ft./lbs.
    Maximum RPM5800
    Camshaft TypeHydraulic Roller Tappet
    Cylinder Head MaterialAluminum
    Piston MaterialHypereutectic Aluminum
    Crankshaft MaterialForged 4340 Steel
    Camshaft Duration (.050 in)208° intake / 221° exhaust
    Camshaft Lift (in).474 intake / .510 exhaust
    Carburetor IncludedNo
    Intake Manifold IncludedYes
    Distributor IncludedNo
    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
    Flywheel IncludedNo
    Spark Plugs IncludedYes
    Spark Plug Wires IncludedNo
    Camshaft IncludedYes
    BlockCast Iron, 4 bolt main
    NotesBroke-in, dyno-verified HP/TQ, and GM-sealed for competition.
    Sold in QuantityEach