These GM Performance Parts ZZ4 350 C.I.D. 350 hp turn key crate engines include all of the necessary parts to get your engine running. With over 400 ft.-lbs. of torque, the ZZ4s are the best way to put an aluminum head, 4-bolt main block, roller cam, high performance small block between your favorite fenders. The aluminum angle-plug cylinder heads have screw-in rocker studs, 1.94 in. intake and 1.50 in. exhaust valves, and 58cc combustion chambers that yield a crisp and responsive 10:1 compression ratio. Also included are lightweight valve spring retainers, radiused valve seats, and valve stem seals to help keep the oil where it belongs. To complement the cylinder head design, we've incorporated a billet steel hydraulic roller tappet camshaft with a .474 in. intake and .510 in. exhaust valve lift. The combination makes 355 hp at 5,250 rpm and has that great-sounding musclecar idle, with just enough lope to let people know that these are no station wagon engines.

Additional features include:

* HEI distributor with an ignition timing advance curve developed for performance
* Spark plugs and wire set
* Dual-plane aluminum intake manifold
* Holley 770 cfm carburetor
* Chrome air cleaner kit
* Fuel pump
* 8 in. harmonic balancer
* 12.75 in. automatic transmission flexplate
* Starter
* Cast iron water pump
* Serpentine accessory drive pulley system for non air-conditioned applications