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Chevrolet Performance LSX454R 7.4L Crate Engine

Brand: Chevrolet Performance

Part Number: 19260835




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LSX454R Crate Engine

19260835 Chevrolet Engine


 Our Most Powerful LS Engine Ever!

Quite simply, the LSX454R drag racing engine is the most powerful crate engine ever from Chevrolet Performance – and it’s designed to do one thing: help you win races with great durability.

For the record, this 13.1:1, naturally aspirated and single Dominator-fed big-inch LS engine is officially rated at 776 hp at a 7,000 rpm and 649 lb.-ft. of torque at 5,100 rpm. It breathes through our high-flow LSX DR six-bolt cylinder heads that have 313cc intake runners. More than power, this engine was built for durability. Its bottom end includes our tough LSX Bowtie cylinder block and it’s filled with an all-forged rotating assembly.

During development, engineers simulated the equivalent of 600 back-to-back drag strip passes on the engine dyno, ensuring it would stand up to years of performance without the need for major maintenance. It’s an engine you can depend on to go round after round, season after season!

LSX454R Crate Motor

P/N 19260835

776 hp @ 7,000 rpm / 649 lb.-ft. @ 5,100 rpm


LSX454R Tech Specs:
Part Number: 19260835
Engine Type: LS-Series 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 (P/N 19260099): LSX cast iron with 6-bolt cylinder head attachment
Crankshaft (P/N 19244018): 4340 forged steel
Connecting Rods (P/N 19166964): 4340 forged steel
Pistons: (P/N 19166958): 4032 forged aluminum
Camshaft Type (P/N 19166975): Mechanical roller
Camshaft Lift (in): .738 intake / .738 exhaust
Camshaft Duration (@.050 in): 250° intake / 270° exhaust
Cylinder Heads (P/N 19166979): Drag race cylinder heads 6-bolt; LSX aluminum
Valve size (in): 2.250" x 6.370" intake 1.625" x 6.400" exhaust
Compression Ratio: 13.1:1
Rocker Arms (P/N 19201808): Shaft mounted with needle bearing fulcrum and tip
Rocker Arm Ratio: 1.9:1
Recommended Fuel: Race fuel (110 octane minimum)
Maximum rpm: 7,100
Reluctor Wheel: 58x
Balanced: Internal


Installation Notes:
• Intended for off-road use only!
• Requires Race Fuel (110 Octane Minimum)
• Not intended for Marine Use
• Requires LSX Ignition Controller P/N 19171130
• Oil pan not included (Dust shield installed for shipment)
• LSX 8-bolt crank flange
• Uses 4500-series carburetor (included)


Chevrolet Performance Racing Crate Engines are excluded from limited warranty.