Power Filter Kit directs cooler, fresh air directly to your supercharger delivering awesome performance and eliminating power-robbing heat intake. Unrestricted air is delivered to engine via large 4" smooth-bore ducting that is attached to supercharger with unique velocity stack and sturdy billet clamps. Requires use of RIVA Catch Can/Oil Breather System (part# RS19050-BCC-2). Kit includes water-repellent pre-filter and detailed installation instructions. Fits RXP/RXT 260 & GTR 215/230 models only.