88958603 - GM Performance 603 (sealed) Circle Track Race Engine, ZZ4 350CID 355HP

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 dual plane intake manifold, stamped steel valve covers with racing style breathers, and an 8 quart dual kick out oil pan.

Based on the ZZ4 street engine, this racing crate engine is a great value with it's 1053 forged steel crankshaft, aluminum heads with 1.94"/1.50" valves, hydraulic roller lifters,HEI distributor, and a standard rotation cast iron water pump.

The base engine is a ZZ4 with the following parts changes: 8 quart circle track oil pan,special valve covers with breathers,special "Kool Nut" rocker arm nuts. Sealed fasteners on the front timing cover, intake manifold and cylinder heads.

Specifications:
Power: 355 HP @ 5250 RPM, 405 ft. lbs. of torque @ 3500 RPM
Displacement: 350 CID, 5.7L
Bore x Stroke: 4.00” x 3.48”
Compression Ratio: 10:1
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: Aluminum, 3/8” screw-in rocker studs.
Combustion Chamber: 58cc
Valves: 1.94” Intake/ 1.50” Exhaust
Rocker Arms: Stamped Steel, 1.5:1 Ratio
Balance: Internal
Maximum GM Recommended RPM: 5800
Ignition Timing: Base 10 degrees BTDC, 32 degrees total

Engine Includes:
• Fully GM assembled long block
• Stamped Steel Black OE Valve with Breathers
• Oil pump, pick-up and oil pan
• Aluminum Performance Intake
• HEI Distributor and Spark Plugs
• 12-3/4” Auto Trans Flexplate
• 8” Harmonic Balancer
• Front timing cover
• Cast Iron Long Water Pump

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