Chevrolet 19417357 LSX 454 7.4L Iron Block Crate Engine

Description

Launch 600-plus horsepower track dragsters with the Chevrolet Performance 19417357 Crate Engine. Displacing 7.4 liters across 454 cubic inches within an iron LS configuration, this LSX 454 competition long block produces 627 horsepower at 6300 RPM and 586 lb-ft torque at 5100 RPM. All forged internals and LSX six bolt heads deliver immense displacement power for track dominance.

A genuine GM LSX cast iron Bowtie block features cross bolted six bolt iron main caps and thick deck surfaces. The reciprocating group combines a 4340 forged steel 4.125 inch stroke crankshaft, forged 4340 H-beam rods, and forged aluminum pistons inside 4.185 inch cylinder bores. The 11.0:1 compression ratio runs on 93 octane pump gas. Bare long block weight establishes 480 lbs.

Key Features of Chevrolet Performance 19417357

Buy Chevrolet Performance 19417357 crate engine units to construct high revving pro touring racers, bracket dragsters, and road course track cars. The long block configuration delivers a race proven valvetrain core ready for builder choice induction and exhaust hardware.

• Stroker 4.125 inch forged crankshaft produces 586 lb-ft torque to launch heavy vehicle chassis hard.
• LSX rectangular port aluminum cylinder heads flow massive intake air volume past 6500 RPM.
• Six bolt cross bolted iron main caps eliminate crank journal flex under elevated track RPM loads.
• Forged 4340 steel crankshaft withstands severe torsional loads during continuous high RPM operation.
• Chevrolet Performance 19417357 valvetrain components feature full roller rocker arms to minimize friction.
• Hydraulic roller camshaft profile creates sharp valve events without valve float past 6500 RPM.
• Large 4.185 inch cylinder bores unshroud valves to maximize high RPM cylinder charging.

Max Displacement LSX Dyno Verification

Testing on water brake engine dynamometers validates 627 brake horsepower at 6300 RPM and 586 lb-ft torque at 5100 RPM across a wide 2500 to 6600 RPM band. Camshaft events measure 236 degrees intake and 246 degrees exhaust duration at 0.050 inch lift, producing 0.612 inch intake and 0.612 inch exhaust lift. The engine draws 12 in-Hg vacuum at 900 RPM on 93 octane fuel, holding 50 to 65 PSI hot oil pressure.

LSX 454 Engine Bay Envelope Spacing

Standard GM LS architecture drops between subframe rails on vintage Camaro, Chevelle, and C10 chassis when paired with swap engine mount plates. The crankshaft accepts 4L80E, 6L90E, or manual transmission bellhousings using standard LS flexplates or flywheels. Low profile cylinder heads clear factory firewall sheet metal, while the open pan rail accepts custom muscle car pans.

High Output Long Block Priming

Pre prime the engine oiling channels with high zinc break in oil using an oil pump drive tool prior to startup. This competition long block is not engineered for marine bilge setups, forced induction boost exceeding six PSI on stock ring end gaps, or unmetered nitrous oxide systems.

• Drain break in oil and replace the spin on lube filter after the first 500 operating miles.
• Perform regular motor oil changes every 3000 miles or six months with high zinc synthetic oil.
• Check valve lash adjustments and inspect spark plug deposits every 6000 street miles.

LSX 454 Warranty Shipped Manifest

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled LSX 454 long block, six bolt aluminum cylinder heads, valve covers, timing cover, harmonic balancer, comprehensive installation guide, and an official dynamometer run sheet.