Our engineers took the 454 HO — with its super-tough, all-forged reciprocating assembly — and matched it with a set of higher-flow, oval-port aluminum cylinder heads to pick up an additional 15 horses, while still offering 500 lb-ft of torque. We dubbed it the ZZ454/440, and it’s an affordable high-performance Big-Block for any chassis you can stuff it in.
The ZZ454/440 uses our new cylinder block casting for greater strength and performance, while the aluminum heads use smaller, 110-cc combustion chambers to boost compression to 9.6:1, up from 8.5:1 on the 454 HO. We then match the airflow capability with a high-lift, hydraulic roller camshaft that delivers great idle quality and requires no periodic lash adjustments.
Our crate engine package includes the ZZ454/440 assembled with a water pump, balancer, aluminum intake manifold, and a 14-inch flexplate. Your Chevrolet Performance dealer can hook you up with the carburetor, starter, ignition system, and other accessories required to get this big-power Big-Block started.
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 12363392):
Aluminum oval port; 110-cc chambers
Valve Size (in.):
2.190 intake / 1.880 exhaust
Rocker Arms (P/N 12368082):
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.
Download a catalog for a full listing of components and related parts.
* 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.