Chevrolet LSX454 7.4L 620HP Engine -19417357

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The LSX454 is filled with an all-forged, super-tough rotating assembly and features a pair of our new, deep-breathing LSX six-bolt cylinder heads. It also comes dressed with great-looking, orange powder-coated valve covers with engraved “LSX454” logos.

We deliver the LSX454 without an intake manifold and other accessories. With a carburetor and high-flow Chevrolet Performance intake manifold, the LSX454 is good for about 620 horsepower and 600 lb-ft of torque, or about 580 hp and 600 lb-ft with fuel injection.

Use the LSX-LS7 single-plane carbureted intake manifold (P/N 19244033). The LSX454 valve covers do not include provisions for mounting ignition coil brackets. Aftermarket or custom relocation brackets must be obtained. It also includes an eight-bolt crankshaft flange that may require an adapter for use with some transmissions.

Power: 620 HP @ 6200 RPM, 590 ft. lbs. of torque @ 4800 RPM
Displacement: 454 CID, 7.4L
Bore x Stroke: 4.185” x 4.125”
Compression Ratio: 11:1
Recommended Fuel: 92 Octane
Block: LSX Cast Iron with 6 bolt cross bolted main caps
Crankshaft: 4340 Forged Steel, with 8 bolt flange
Connecting Rods: 4340 Forged Steel
Pistons: Forged Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .635” Intake / .635” exhaust
Cam Duration @ .050”: 236 deg. Intake / 246 deg. 
Exhaust Lobe Separation: 110 Deg
Cylinder Heads: Aluminum LSX LS7 Rectangular style ports
Combustion Chamber: 70cc 
Valves: 2.200” Intake/ 1.610” Exhaust
Rocker Arms: Cast Roller Trunion, 1.8:1 Ratio
Balance: Internal
Reluctor: 58X
Maximum GM Recommended RPM: 6500

Engine Includes:
• Fully GM assembled long block
• Harmonic Balancer
• Front timing cover