Product Summary

350, 604, Deluxe Crate Engine Crate Engine Type

  • F1.5:1 ratio aluminum roller rocker arms
  • Specially built with high-revving matched components
  • Sealed with IMCA-issued bolts and is approved for use in IMCA
  • Produces an astonishing 400 HP @ 5500 RPM and 400 ft. lbs. of torque @ 4500 RPM
  • Cam lift measures .474" intake / .510" exhaust and has a cam duration of 050": 208° intake / 221° exhaust

Key Specs

MFG. Part #88869604
BrandChevrolet Performance Parts
Crate Engine TypeDeluxe Crate Engine
Engine Displacement350 cu. in.

Need To Know

Made to Order

This custom item will ship when completed

Truck Ship

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

Quick and Easy Returns

Return Policy


Run up front with the 400-horsepower CT400 crate engine featuring GM Fast Burn heads! GM Performance Parts' Fast Burn cylinder heads are the fast way to the winner's circle – and they're standard on the 350/400 GM racing engine (often referred to as the "604 crate") from GM Performance Parts.

These IMCA-sealed 604 crate engines, formerly sold as Chevrolet Performance 88869604, 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.

  • High-revving matched components
  • A fraction of the price of a custom engine
  • Sealed with IMCA-issued bolts and is approved for use in IMCA
  • 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
  • IMCA-approved seal kit

*Check track/series rules for approved applications.


IMCA Approved.



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
BrandChevrolet Performance Parts
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
Bore x Stroke (in)4.000" x 3.480"
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
NotesIMCA-sealed for competition.
Sold in QuantityEach