454 CI | 7.4L LSX Engine

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MSRP: $14,999.99
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Brand New! Not used!

One of the most legendary engines in muscle car history is the Chevy 454 Big-Block. With the LSX Bowtie block, GM Performance Parts 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. It’s
perfect as the power plant for a late-model Camaro drag car or a high-tech retro-fit for a ’70 Chevelle pro-touring machine.

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, all-new orange powder-coated valve covers with engraved “LSX454” logos. GMPP delivers the LSX454 without an intake manifold and other accessories. With a carburetor and high-flow GM Performance Parts intake manifold, the LSX454 is good for about 620 horsepower and 600 lb-ft of torque —or about 580 hp and 600 lb-ft. with fuel injection.

NOTE: Due to the number of application variations, the LSX454 crate engine does not include an oil pan. See the LS Engine Components section for production-style oil pan choices. Also, the LSX454 valve covers do not include provisions for mounting the ignition coil brackets. Aftermarket or custom relocation brackets must be sourced.

  • HP: 620 @ 6200 rpm
  • TQ: 590 @ 4800 rpm
  • 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 (P/N 19243172): LSX cast-iron with 6-bolt, cross-bolted main caps
  • Crankshaft (P/N 19170391): 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): 0.635" intake / 0.635" exhaust
  • Camshaft Duration (@0.050 in): 236° intake / 246° exhaust
  • Cylinder Heads (P/N 19201806): 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, roll trunnion
  • Rocker Arms (P/N 12579617 exh): Investment-cast, roll trunnion
  • Rocker Arm Ratio: 1.8:1
  • Recommended Fuel: 92 octane
  • Maximum Recommended RPM: 6,500
  • Reluctor Wheel: 58X
  • Balanced: Internal
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