2008 Hot Products Catalog

80 INTAKE SYSTEMS ENGINE/ GASKETS EXHAUST DRIVE LINE HANDLING ELECTRICAL WATERLINE /BILGE STEERING & CONTROLS BODY ACCESSORIES SERVICE TOOLS /HARDWARE CHEMICAL ULTRA 250X • EXHAUST SYSTEM & COMPONENTS RIVA RACING BLOCK-OFF VALVE COVER KAW 4-STROKE ENGINE ULTRA 250X/LX; STX-15F/12F The Ultra 250X Valve Cover Block-off Kit is designed to seal off the ports on the valve cover when removing the emission control system for racing applications. There are two major benefits to removing the factory emissions system: 1) For racing applications it is recommended to remove all necessary equipment from your craft for increased reliability and reduced maintenance. This also cleans up plumbing in the engine compartment providing a clean look. 2) To accurately monitor air/fuel ration for tuning purposes you must remove the emissions system. The OEM system pumps fresh air into the exhaust stream throwing off air/fuel ratio. Plates are precision machined from billet aluminum and anodized to prevent corrosion. Includes two block-off plates and installation instructions. Description Part No. Riva Racing Ultra 250X (07)/LX (07), RK19090-VCB STX-15F, STX-12F Exhaust Emissions Block-off Kit R&D Ultra 250X (07)/LX (07), STX-15F, 331-25000 STX-12F Exhaust Emission Block-off Kit TBM Ultra Ultra 250X (07) Valve Cover Block Offs TBM137 RIVA PRO-SERIES ULTRA 250X WATER BOX The Riva Racing Pro-Series Water Box delivers increased horsepower and performance by reducing exhaust restriction and back pressure. Features lightweight aluminum construction and precise fit. 07 Models: Direct replacement for original water box. Use with RIVA Free Flow Exhaust Kit RK16090. 08 Models: Direct replacement for original water box. Features larger outlet (2-1/4“) compared to stock water box (1-3/4“). Must be used with RIVA Free Flow Exhaust Kit RK16090-08. Description Part No. RIVA Ultra 250X Pro-Series Water Box RK16091 TBM RACING ULTRA 250X VALVE COVER VENT BLOCK OFF PLATE Complete the valve cover dress up with our Valve Cover Vent Block off Plate. This is the last piece to give your engine compartment the ultra trick look. Description Part No. TBM Ultra 250X Valve Cover Vent Block off Plate TBM138 RIVA RACING BILLET ALUMINUM EXHAUST TIP FOR ULTRA 250X/LX, STX-15F/12F Quickly and easily add style to your craft with this direct replacement for the stock, plastic exhaust tip. Made from billet aluminum with laser etched graphics. Anodized to prevent cor- rosion. Description Part No. Riva Racing Billet Aluminum Exhaust Tip RK16086 Ultra 250X/LX, STX-15F, STX-12F Riva Racing Billet Aluminum Exhaust Outlet RK160090-ET Ultra 250X/LX, STX-15F, STX-12F RIVA ULTRA 250X FREE FLOW EXHAUST KIT Enables you to bypass or remove secondary muffler (weight savings of +10lbs) improving engine performance by reducing back pressure and harmful detonation. Formed aluminum exhaust tube is lightweight and powder coated to resist corrosion. Included billet exhaust tip (also sold separately) with laser-etched graphics is anodized to prevent corrosion. High temperature silicone couplers included with detailed installation instructions. Description Part No. Riva Free Flow Exhaust Kit ST-15F/12F RK16085 Riva Free Flow Exhaust Kit RK16090 Ultra 250X (07)/LX (07) Riva Free Flow Exhaust Kit Ultra 250X (08) RK16090-08* *Note: Must use with Part # RS16091 Riva Racing Waterbox RK16086