The Power+Plus Hurricane Manifold is a single plane 360° design that provides optimum power in the mid to upper rpm ranges. Use with any standard square bore performance carb. Features include nitrous bosses, dual distributor holddowns, four corner water ports, and more. Kit also includes special water flow divider which can be substi- tuted for a thermostat for racing use. The Power+Plus Hurricane ports are very specifically positioned to provide an optimum starting point for cus- tom porting. The ports are slightly smaller than Fel-Pro's #1205 gasket. Ideal manifold for drag racing or short track use. Use a 1'' (short track) or 2'' (drag race) carb spacer for opti- mum results. While this manifold is designed to be port matched for racing, if it is used in a non-racing applica- tion no port matching is required. Manifold provides all standard bosses and tapped holes for street accessories. Fits standard port location 23° heads including cast iron Bowtie, Dart Iron Eagle, World, plus most aluminum aftermarket 23° heads. Note: These manifolds are not legal for sale or use on any pollution controlled motor vehicle.Pit Stop USA offers Professional Products SB Chevy Hurricane Intake Manifold - Satin 52031 at low everyday prices. Be sure to check out all of our products from Professional Products including Professional Products Intake Manifolds - Small Block Chevy.