- Designed for 283–400-cubic-inch engines using Vortec cylinder heads P/N 12691728,
   P/N 19431662, P/N 19431663,
   P/N 19331470 or P/N 19331472
- Has 4 bolts per side to attach it to these cylinder heads
- Aluminum high-rise design maximizes horsepower and delivers a broad torque curve
- Accepts a square-bore 4150-style carburetor and includes externally 
   plumbed hot water crossover passage
- Use manifold gasket P/N 89017465 and 8 attachment bolts, P/N 12550027

NOTE: Vortec heads were originally released on 1996–1999 truck engines. Check for hood clearance, especially with Corvette.
 
NOTE: Open carburetor spacer is not recommended for use with dual-plane intake manifolds.