Our Pump Wedge increases the top-speed of your craft 1~2mph. The precision-machined 2-degree wedge angles your pump nozzle upward, raising the bow of your craft for less drag. Features a unique double-sided lip to retain silicone sealant and prevent cavitation. Constructed of aircraft grade aluminum...

The RIVA Yamaha 1.8L High Flow Billet Fuel Rail is an essential upgrade to your fuel system to support increased horsepower from supercharger or turbo modifications. Directly replaces restrictive factory fuel rail for improved fuel delivery and enhances the appearance of your engine bay. Precision m...

Replaces OEM throttle body adapter that is prone to failure and boost leaks. Includes all hardware, gaskets and O-rings for installation. Key Features: Billet Anodized Construction Replaces expensive OEM rubber part which can fail and lead to boost leaks on supercharged models Come...

This adapter allows easy installation of Blow Off Valves (BOV), Fuel Pressure Regulators & Boost Gauges. Direct bolt-on design requires no drilling or modification of intake manifold. Includes one 1/8", 1/4" brass barbed fitting, 2 extra ports for various additional boost & vacuum accessories and bl...

This High Volume Fuel Pump Kit delivers 340LPH to support modified supercharged & turbocharged engine packages. RIVA pumps utilize a turbine pumping mechanism that increases durability and fuel delivery. Kit includes components necessary to eliminate the "unserviceable" paper fuel filter that is bui...

Allows Yamaha SVHO, SHO & HO engines to run cooler by replacing the thermostat with a specialized restrictor. Ideal for modified watercraft operating in high air & water temperatures. Designed to be used with RIVA Engine Cooling Upgrade Kits. Precision machined restrictor includes o-ring system for ...

These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

Our Valve Train Upgrade Kits increase the reliability of your modified engine by reducing the possibility of valve float at high rpm. Includes lightweight, precision-machined titanium valve retainers, racing valve springs, and base washers....