An LSX with Big-Block Power!

With the LSX Bowtie block, we’ve built a 21st century 454 with the latest technology. It’s lighter and more compact than an original Big-Block 454 – while delivering Big-Block output of 627 hp and 586 lb.-ft. – but requires no more space under the hood than a production LS engine.

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

Chevrolet Performance delivers the engine without an intake manifold and other accessories. 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 8-bolt crankshaft flange that may require an adapter for use with some transmissions.


Power: 627 HP @ 6300 RPM, 586 ft. lbs. of torque @ 5100 RPM
Displacement: 454 CID, 7.4L
Bore x Stroke: 4.185” x 4.125”
Compression Ratio: 11.0:1
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: .648” Intake / .648” exhaust
Cam Duration @ .050”: 236 deg. Intake / 246 deg. Exhaust
Lobe Separation: 110
Cylinder Heads: Aluminum LS7 style ports
Combustion Chamber: 70cc
Valves: 2.200” Titanium Intake/ 1.610” Exhaust
Rocker Arms: Cast Roller Trunnion, 1.8:1 Ratio
Balance: Internal
Reluctor: 58X
Maximum GM Recommended RPM: 6500
GM Recommended Torque Converter Stall 3000-3400

Engine Includes:

Harmonic Balancer Pulley
Timing Cover
Valley Cover

Engine Does NOT Include:

Oil Pan
Intake Manifold
Water Pump

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Chevy LS 454 627HP Long Block Crate Engine 19355573

Product Information

  • $11,763.80

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