Chevrolet Performance’s 454 HO crate engine is classic in its own time, offering enthusiasts an affordable Big-Block combination with performance specs that will make you think it’s 1970 all over again — with 425 horsepower and 500 asphalt-wrinkling lb-ft of torque.
The foundation of the 454 HO is a brand-new, updated cylinder block, which incorporates many strength and performance design enhancements – making it a smart and economical alternative to rebuilding. We also add an all-forged reciprocating assembly for maximum durability, a roller camshaft, and a set of rectangular-port iron cylinder heads.
We deliver the 454 HO with a water pump, balancer, 14-inch flexplate, and aluminum intake manifold. Add a carburetor, ignition system, and starter and your budget Big-Block will be ready to roar. All of the necessary parts are available from Chevrolet Performance.
If you want the strength and convenience of the 454 HO bottom end, but want to add your own heads and induction system, use our 454 partial engine (P/N 12498778).
Chevy Big-Block V-8
Displacement (cu. in.):
Bore x Stroke (in.):
4.250 x 4.000
Block (P/N 19170538):
Cast-iron with four-bolt main caps
Crankshaft (P/N 14096983):
Connecting Rods (P/N 19170198):
Pistons (P/N 10215228):
Camshaft Type (P/N 24502611):
Camshaft Lift (in.):
.510 intake / .540 exhaust
Camshaft Duration (@.050 in.):
211° intake / 230° exhaust
Cylinder Heads (P/N 12562920):
Iron rectangular port; 118-cc chambers
Valve Size (in.):
2.190 intake / 1.880 exhaust
Rocker Arms (P/N 12523976):
Rocker Arm Ratio:
Water Pump (P/N 19168606):
Flexplate (P/N 10185034):
Base 4° BTDC, 26° Total
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.
***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.