The Power+Plus Typhoon Manifold is a high perfor- mance dual plane, 180° street manifold designed to be used with Holley, Carter AFB, or Edelbrock square bore carbs. For street applications use 600-700 cfm vacuum secondary carbs. For high performance street, use 700- 800 cfm double pumper carburetors. This manifold produces power comparable to some single plane manifolds yet retains the throttle response and drive ability typical of a dual plane. This manifold also features cast-in nitrous bosses with water outlets at all four corners plus dual distributor holddowns. This manifold is . 70-inches taller than the #52000 or #52001. It has a provision to add an oil fill tube. No provision for exhaust heated or stock style chokes. Accepts late model waterneck, A/C, alternator, and HEI. Will fit cast iron bow tie heads and 87-'95 cast iron or aluminum heads. Will not fit under a stock Vette hood.Pit Stop USA offers Professional Products SB Chevy Typhoon Intake Manifold - Satin 52021 at low everyday prices. Be sure to check out all of our products from Professional Products including Professional Products Intake Manifolds - Small Block Chevy.