An aluminum-headed 440-horse monster in a box!

If you're going to put a big block in your project car, why not add some aluminum heads into the mix? GM Performance Parts took the venerable 454 HO, swapped the cast iron production heads for a set of oval-port aluminum castings, ands created the ZZ454. Not only do the aluminum cylinder heads flow more air, but you also drop almost 100 pounds off the nose of your car - dramatically improving performance.

The aluminum heads of the ZZ454/440 account for 15 horse improvement over the iron-headed 454 HO. These oval-port aluminum heads use huge 2.25" intake and 1.88" exhaust valves as well as small combustion chambers to add to the efficiency of the 454" big-block. The bottom end includes a Gen VI four-bolt, a forged steel crank, forged connecting rods, and forged pistons. A roller camshaft with a .510/.540" lift specs deliver a big-block loping idle as well as add to the high performance punch of the entire crate engine.

The ZZ454/440 is delivered as a complete assembly including water pump, balancer, intake manifold, and 14" automatic transmission flexplate. All you need to do is add your carburetor, ignition, and starter to complete the project.

Specifications:

Engine Type:Chevy big block v8
Displacement:454
Bore x Stroke:4.25 x 4.00
Block (P/N 809-10237292):Cast iron with 4-bolt main caps
Crankshaft (P/N 809-10183723):Forged steel
Connecting Rods (P/N 809-10198922):Forged steel
Pistons (P/N 809-12533507):Forged aluminum
Camshaft type (P/N 809-12366543):Hydraulic roller
Camshaft lift (in):5.10 intake / .540 exhaust
Camshaft duration (@.050 in):211 degrees intake / 230 degrees exhaust
Cylinder heads (P/N 809-12363390):Aluminum oval port; 110cc chambers
Valve size (in):2.25 intake / 1.88 exhaust; stainless steel
Compression Ratio:9.6:1
Rocker Arms (P/N 809-12368082):Stamped steel
Rocker Arm ratio:1.7:1
Water pump (P/N 809-12484890):Cast iron, long-style
Flexplate (P/N 10185034):14"
Recommended fuel:92 octane
Ignition timing:Base 4 degrees BTDC. 26 degrees total
Maximum recommended rpm:5500
Balanced:External