One of the most legendary engines in muscle-car history was the Chevy 454 Big-Block. With the LSX Bowtie block, Chevrolet Performance 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.
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, orange powder-coated valve covers with engraved “LSX454” logos.
We deliver the LSX454 without an intake manifold and other accessories. With a carburetor and high-flow Chevrolet Performance 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.
Use the LSX-LS7 single-plane 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 eight-bolt crankshaft flange that may require an adapter for use with some transmissions.
LSX-Series Gen IV Small-Block V-8
Displacement (cu. in.):
Bore x Stroke (in.):
4.185 x 4.125 (106.3 x 104.8 mm)
Block (P/N 19244057):
LSX cast-iron with six-bolt, cross-bolted main caps
Crankshaft (P/N 19244018):
4340 forged steel with eight-bolt flange
Connecting Rods (P/N 19166964):
4340 forged steel
Pistons (P/N 19166958):
Camshaft Type (P/N 19166972):
Valve Lift (in.):
0.648 intake / 0.648 exhaust
Camshaft Duration (@.050 in.):
236° intake / 246° exhaust
Cylinder Heads (P/N 19201806):
Aluminum LSX-LS7 port; with “as cast” 70-cc chambers
Valve Size (in.):
2.200 titanium intake / 1.610 hollow, sodium-filled exhaust
Rocker Arms (P/N 12579615 int):
Investment-cast, roll trunnion
Rocker Arms (P/N 12579617 exh):
Investment-cast, roll trunnion
Rocker Arm Ratio:
Maximum Recommended rpm:
Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.
* The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges. Click here to see the 2015 City Express destination freight charge. Click here to see the 2015 Colorado destination freight charge.
***The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Includes destination freight charge and gas guzzler tax.
Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.
To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.