Big-Block performance built from our LSX Small-Block One of the most legendary engines in muscle-car history was the Chevy 454 Big-Block. With the LSX Bowtie block, Chevrolet Performance engineers were able to build a 21st century 454 with the latest technology and 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 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. Use the LSX-LS7 single-plane carbureted intake manifold. 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.
Part Number: 19332316
Engine Type: LSX-Series Gen IV Small-Block V-8
Displacement (cu in): 454 cu in (7.4L)
Bore x Stroke (in): 4.185 x 4.125 (106.3 x 104.8 mm)
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 Type: Hydraulic roller
Valve Lift (in): 0.648 intake / 0.648 exhaust
Camshaft Duration (@0.050 in): 236° intake / 246° exhaust
Cylinder Heads: 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: Investment-cast, roll trunnion
Rocker Arms: Investment-cast, roll trunnion
Rocker Arm Ratio: 1.8:1
Recommended Fuel: Premium pump
Maximum Recommended rpm: 6,500
Reluctor Wheel: 58x
Balanced: Internal
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)
Intended for pre-1976 street vehicles or any off-road vehicle
Not intended for marine applications
Requires LSX Ignition Controller when using a carburetor
LSX 8-bolt crank flange
Requires premium fuel