The Power+Plus Typhoon manifold for 351W engines is the ultimate street performance manifold for this engine. It provides good top end power without sacrificing bottom end torque. Its long runner dual plane design provides the best of both worlds. Best with an aggressive street cam. For street, use a 600-750 cfm vacuum secondary or double pumper carb. For competition, use a 750-850 cfm double pumper. This manifold has a number of features not found in simi- lar competitive manifolds. It includes a rear water crossover passage which can provide for more balanced cylinder head temperatures and a cooler running engine. It also has cor- rectly positioned nitrous bosses for those of you who would like to add port nitrous injectors to your engine. Remember that every Power+Plus manifold is 100% pressure tested to discover any air, water, or exhaust leaks before you install it on your engine.Pit Stop USA offers Professional Products SB Ford 351W Typhoon Intake Manifold - Satin 54023 at low everyday prices. Be sure to check out all of our products from Professional Products including Professional Products Intake Manifolds - Small Block Ford.