Forged Crank, Forged Rods, Forged Pistons LS 402CID 550HP 550TQ EFI Performance Crate Engine


Power: 550 HP & 550 ft. lbs. of torque
Displacement: 6.6L 402 CID
Bore x Stroke: 4.005” x 4.000”
Compression Ratio: 11.2:1
Recommended Fuel: 91 Octane
Block: Honed and decked LS2 aluminum block
Crankshaft: Callies Forged
Connecting Rods: Forged Callies H-Beam
Pistons: Forged CP Bullet
Camshaft: Hydraulic Roller Tappet, 3-Bolt
Cylinder Heads: New CNC LS3 Performance Aluminum
Combustion Chamber: 69cc
Valves: 2.165” Intake/ 1.600” Exhaust
Rocker Arms: Upgraded Trunnion GM Aluminum Roller, 1.7:1 Ratio
Balance Front: Internal
Balance Rear: Internal
Ignition: 58X Reluctor

Engine Includes:

LS3 EFI Intake Manifold
Timing Cover
Your choice of oil pan: GM F/body, Corvette C6 or Mast musclecar pans
Throttle Body
Injectors and Fuel Rails
Coil Packs and Valve covers
Spark Plugs and Wires
Harmonic Balancer

Warranty: Limited 12 month warranty

Handbuilt LS engines feature the best components and are assembled by professional machinist. All handbuilt engines feature ARP Main Studs, ARP Head Bolts and a balanced and blueprinted block.

The 550 Performance Street Engine has a engineered camshaft that is custom ground on a billet cam core. The 402 foundation is a honed and decked LS2 aluminum block with a 4.000” forged Callies rotating assembly with CP pistons that is topped off with Mast L93 heads and a LS3 intake manifold. ARP fasteners are used throughout and Mast pushrods ride on LS7 hydraulic roller lifters. The 550 Performance Street Engine peaks at the 550+ horsepower mark and is competitively priced for such a powerful complete fuel injected turnkey crate engine.

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Chevy LS 402 550HP Crate Engine 19111010

Product Information

  • $14,200.00

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