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88958604 - Chevrolet Performance Parts 604 (Sealed ) Circle Track Race Engine 350CID 400HP

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Replaced by part number 19318604


Great Racing Power At a Reasonable Cost!

This is a factory sealed crate engine designed for circle track competition. these engines come with a high rise single plane intake manifold, stamped steel valve covers with racing style breathers, and an 8 quart dual kick out oil pan.

Based on the "Fast Burn 385" street engine, this racing crate engine is a great value with it's 1053 forged steel crankshaft, aluminum heads with 2.00"/1.55" valves, hydraulic roller lifters, HEI distributor, and a standard rotation cast iron water pump.

The base engine is a Fast Burn 385 with the following parts changes: 8 quart circle track oil pan, special valve covers with breathers, 1.5 ratio aluminum roller rocker arms. Sealed fasteners on the timing cover, intake manifold and cylinder heads.

Power: 400 HP @ 5500 RPM, 400 ft. lbs. of torque @ 4500 RPM
Displacement: 350 CID, 5.7L
Bore x Stroke: 4.00” x 3.48”
Compression Ratio: 9.6:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps.
Crankshaft: Forged Steel
Connecting Rods: Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .474” Intake / .510” exhaust
Cam Duration @ .050”: 208 deg. Intake / 221 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: Dual Bolt Pattern Fast Burn Aluminum, 3/8” screw-in rocker studs.
Combustion Chamber: 62cc
Valves: .200” Intake/ 1.55” Exhaust
Rocker Arms: Stamped Steel, 1.5:1 Ratio
Valve Springs: 12551483
Balance: Internal
Maximum GM Recommended RPM: 5800
Ignition Timing: Base 10 degrees BTDC, 32 degrees total

Engine Includes:
• Fully GM assembled long block
• Black Steel Valve Covers with Breathers
• Oil pump, pick-up and 8 quart oil pan
• 12496822 Eliminator Vortec Intake
• Spark Plugs
• 8” Harmonic Balancer
• Front timing cover

Excludes the General Motors limited 2 year / 50,000 mile parts & labor warranty.


  • 88958604
  • 88958604
  • Chevrolet Performance Parts
  • Replaced by part number 19318604
  • New


Customer Reviews

Comment Total Reviews (1)

Crate 604
  • Currently 5/5 Stars

Reviewed by: Len07/09/2012 12:47PM

Product ownership: A year or longer

Not purchased from: Pace Performance

Some of the specs are incorrect. This engine has aluminum rockers, does not come with HEI dist. The 2 items are spec'd for the 602 Crate , not the 604.

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