3.5 inch Polished Air Intake with Velocity Stack for 92-00 Honda Civic / 94-01 Acura Integra with Skunk2 Ultra Street Intake Manifold. Skunk2 Ultra Street Intake Manifold. A Valex Racing original product. We take a 3.5 Aluminum intake pipe and modify it for the proper angel to work with the Skunk2 Ultra Street B Series intake manifold.We then pair it with a composite velocity stack for a functional and unique intake system. Filter and Intake Manifold is NOT included.