Original ZZ430 (12496430) Number 429

Used in street rod approx. 500 miles....Set of coated hugger headers included.

Engine Background:

The limited edition ZZ430 is GM Performance Parts' most powerful small-block crate engine. With 430 HP at 5800 RPM and 430 Ft/Lbs. of torque at 4000 RPM, it has a compression ratio of 9.6:1. Stats like that ensure the ZZ430 a place in history, with only 430 being produced, its sure to be one of the rarest and most sought after as well. The ZZ430 is also the first engine to use GM Performance Parts' revolutionary new Fast Burn cylinder heads, making another moment in history.
Each ZZ430 engine will have an exclusive three-digit serial number CNC machined into unique 18° competition valve covers. The serial numbers will be 001 through 430. The valve covers, originally designed for GM sponsored NASCAR teams, are powder coated black and then CNC machined with the GM Performance Parts and ZZ430 logos in addition to the three digit serial number.
The ZZ430 uses the time proven ZZ4 short block assembly that has powered thousands of hot rods, street machines, drag racers and circle track racers. Add to that solid foundation GM's HOT cam, which was developed by GM motor sports for the LT1 and LT4 engines used in showroom stock road racing. Topping off the 430 HP long block assemblies are the new Fast Burn cylinder heads. The ZZ430 then gets dressed up with an aluminum water pump, and aluminum dual-plane intake manifold. A 750cfm Holley vacuum secondary carburetor with an electric choke, and chrome high performance air cleaner round out the induction system. A GM HEI distributor, GM Performance Parts 8mm plug wires with looms and AC Delco spark plugs make up the ignition system. Self-aligning roller rocker arms, with a 1.6 to 1 ratio, are used in conjunction with the HOT cam to actuate the hollow stem intake valves and sodium filled exhaust valves. The starter included with the ZZ430 is a gear reduction design. And its compact design drops nine pounds off its weight when compared to conventional starter designs. In addition the ZZ430 will include an automatic transmission flex plate and eight inch torsional damper.
the HOT cam's specs were developed to ensure long term valve train durability, and a broad and responsive torque curve. Specifically designed for use with 1.6 to 1 ratio rocker arms, the HOT cam maximizes performance throughout the usable RPM range of the ZZ430.
A prototype ZZ430 successfully completed the 1998 Sebring 12 hour race. That's 12 hours at nearly 7000 RPM without a failure. The 430 limited edition production ZZ430 engines are being individually hand assembled from short blocks produced at GM's Flint V8 assembly plant, to ensure that the same durability proven at Sebring is a part of every ZZ430 produced.

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