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.

See our reference guide P/N 88959384 for installing
an LS engine in an older car.

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.

Old part number = 19170112.

• 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

Please note that there is a misprint in the GMPP printed catalog and that a flexplate is NOT included with this crate engine. INSTALLATION NOTES • Assembly does not include any electronics • Intended for pre-1976 street vehicles or any off-road vehicle • Not intended for marine applications • Requires LSX Ignition Controller P/N 19171130 • Requires the purchase and installation of an oil pan (see page 219) • LSX 8-Bolt Crank Flange