Aluminum manifold used on all ZZ series 350 HO engines and also can be used on all small-blocks through 1986. Dual-pattern carburetor flange is approximately 1/2" lower than the LT-1 intake, while producing the same horsepower. Provisions for all late-model accessory brackets, EGR, and an integral hot air choke. A heat shield can be mounted underneath for improved performance.

• This manifold WILL NOT work on Vortec style intake ports. For engines with heads that have Vortec style ports (Vortec heads or Fast Burn heads) use P/N 12366573.