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, orange powder-coated valve covers with engraved “LSX454” logos. Chevrolet Performance delivers the engine without an intake manifold and other accessories. Use LSX-LS7 singleplane 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 8-bolt crankshaft flange that may require an adapter for use with some transmissions. TECH SPECS Part Number: 19332316Engine Type: LSX-Series Gen IV Small-Block V-8Displacement (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 capsCrankshaft : 4340 forged steel with 8-bolt flangeConnecting Rods : 4340 forged steelPistons : Forged aluminumCamshaft Type : Hydraulic rollerValve Lift (in): 0.648 intake / 0.648 exhaustCamshaft Duration (@0.050 in): 236° intake / 246° exhaustCylinder Heads (P/N 19419193): Aluminum LSX-LS7 port; with “as cast” 70cc chambersValve Size (in): 2.200 titanium intake/1.610 hollow, sodium-filled exhaustCompression ratio: 11.0:1Rocker Arms int): Investment-cast, roll trunnionRocker Arms exh): Investment-cast, roll trunnionRocker Arm Ratio: 1.8:1Recommended Fuel: Premium pumpMaximum Recommended rpm: 6,500Reluctor Wheel: 58xBalanced: Internal 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)• Intended for pre-1976 street vehicles or any off-road vehicle• Not intended for marine applications• LSX 8-bolt crank flange• Requires premium fuel
