Oval-port aluminum heads deliver big power in an affordable package
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 resulting in 469 hp and 518 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.
Engine Type: Chevy Big-Block V-8
Displacement (cu. in.): 454
Bore x Stroke (in.): 4.250 x 4.000
Block (P/N 19170538): Cast-iron with four-bolt main caps
Crankshaft (P/N 14096983): Forged steel
Connecting Rods (P/N 19170198): Forged steel
Pistons (P/N 10215228): Forged aluminum
Camshaft Type (P/N 24502611): Hydraulic roller
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
Compression Ratio: 9.6:1
Rocker Arms (P/N 12368082): Stamped steel
Rocker Arm Ratio: 1.7:1
Water Pump (P/N 19168606): Cast-iron, long-style
Flexplate (P/N 10185034): 14"
Recommended Fuel: 92 octane
Ignition Timing: Base 4° BTDC, 26° Total
Maximum Recommended rpm: 5500