Skunk2 (343-05-0200) Cold Air Intake System for Honda Civic Each kit includes a 3.5-inch internal diameter lower tube and a tapered, 3.5-inch to 3.0-inch internal diameter upper tube that connects to the factory throttle body with a high-quality, silicone connector Skunk2's design positions the air filter downward-facing for approximately two inches of additional ground clearance when compared to competitor's designs that locate the air filter from the side Doesn't require cutting or modifying the factory fender liners, greatly reduces the chances of water entering the intake during wet conditions Unlike other intake systems, only Skunk2's unique design and brackets allow for the OEM battery to be retained