The Riva EX/EXR Power Filter Kit feeds your TR-1 engine a steady diet of cool air delivering greatly improved acceleration and RPM. Replaces restrictive stock air box with a high-volume, precision-formed intake duct that attaches to the throttle body via a silicone coupler. Factory hull vents provide cool air that enters the system via an oversized K&N filter element. Also features an easy to install Engine Breather Upgrade Kit that eliminates power-robbing crankcase emissions from your engine's air intake. Includes detailed installation instructions.