Horsepower: 627 HP

Torque: 586 LB-FT

An LSX with Big-Block Torque

With the LSX Bowtie block, we’ve built a 21st century 454 with our latest technology. It’s lighter and more compact than an original Big-Block 454–and it delivers the stunning, big-torque output you expect: 586 lb.-ft., along with 627 horsepower. Best of all, it 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, orange powder-coated valve covers with engraved LSX454 logos.

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.

INSTALLATION NOTES

• Assembly does not include any electronics
• Requires LS7 pattern intake manifold
• Assembly shipped without an intake manifold
• Requires the purchase and installation of an oil pan (dust shield installed for shipment)
• Not intended for marine applications
• Requires LS/LSX Ignition Controller P/N 19355418 when using a carburetor
• LSX 8-bolt crank flange
• Requires premium fuel
• Use LSX454 control kits for fuel injected applications (P/N 19354342 for automatic transmissions or P/N 19369179 for manual transmissions)

TECH SPECS

• Part Number: 19417357
• Engine Type: LSX-Series Gen IV Small-Block V-8
• Displacement (cu in): 454 (7.4L)
• Bore x Stroke (in): 4.185 x 4.125 (106.3 x 104.8 mm)
• Block (P/N 19417353): LSX cast iron with 6-bolt, cross-bolted main caps
• Crankshaft (P/N 19244018): 4340 forged steel with 8-bolt flange
• Connecting Rods (P/N 19166964): 4340 forged steel
• Pistons (P/N 19166958): Forged aluminum
• Camshaft Type (P/N 19166972): Hydraulic roller
• Valve Lift (in): .648 intake / .648 exhaust
• Camshaft Duration (@.050 in): 236° intake / 246° exhaust
• Cylinder Heads (P/N 19419193): Aluminum LSX-LS7 port; with “as cast” 70cc chambers
• Valve Size (in): 2.200 titanium intake/1.610 hollow, sodium-filled exhaust
• Compression Ratio: 11.0:1
• Rocker Arms (P/N 12579615 int): Investment-cast, roller trunnion
• Rocker Arms (P/N 12579617 exh): Investment-cast, roller trunnion
• Rocker Arm Ratio: 1.8:1
• Recommended Fuel: Premium pump
• Maximum Recommended rpm: 7,100
• Reluctor Wheel: 58x
• Balanced: Internal