Product Summary

604, Long Block Crate Engine Type, 400 ft./lbs. Torque

  • 400 HP @ 5500 RPM
  • 400 Ft lbs. Torque @ 4500 RPM
  • CNC Machined Block
  • Popular in Late Models, Modifieds, and other classes
  • Comes Complete Intake to Pan

Key Specs

Crate Engine TypeLong Block
Engine Displacement350 cu. in.
Horsepower400 horsepower
Compression Ratio9.6:1
Torque400 ft./lbs.

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

Speedway Motors Racing Engines 19419604 Details

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 dressed & dyno-verified package that is ready to race! 

These IMCA-sealed 604 crate racing 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
  • MSD Pro-Billet distributor is installed & timed
  • Engine is ready to race, right out of the crate
  • IMCA-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
  • MSD Pro-Billet85501distributor
  • Moroso Ultra 40 spark plug wires, black, under-header (terminals installed)
  • Spark plugs
  • 8" harmonic balancer
  • Front timing cover
  • Fuel pump block-off plate
  • Dyno sheet of your engine
  • IMCA-issued bolts and is approved for use in IMCA

*Check track/series rules for approved applications.




Chevrolet/GM Performance's Crate Engine Warranty will not cover engines that fall into the following categories:

  • Any vehicle that has been used for racing (on or off track), stunt driving, performance testing, or used under other extreme operating conditions
  • Racing engines and/or components

This engine is sold as a Race Engine and does not carry any warranty.

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.

Speedway Motors Racing Engines 19419604 Specifications

MFG. Part #19419604
BrandSpeedway Motors Racing Engines
Crate Engine TypeLong Block
Engine Displacement350 cu. in.
Horsepower400 horsepower
Compression Ratio9.6:1
Torque400 ft./lbs.
Camshaft TypeHydraulic Roller Tappet
Cylinder Head MaterialAluminum
Piston MaterialHypereutectic Aluminum
Crankshaft MaterialForged Steel
Combustion Chamber Volume62cc
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
Engine BalanceExternal
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
Cylinder Head StyleAssembled
Intake Runner Volume210cc
Intake Valves IncludedYes
Intake Valve Diameter2"
Exhaust Valves IncludedYes
Exhaust Valve Diameter1.55"
Camshaft IncludedYes
Rocker Arm Ratio1.5:1
Sold in QuantityEach