RXT iS 255 Stage 4 Kit
Note: All testing performed with 1/3 tank of fuel, trim in neutral, sea level elevation, air temp 80-degrees F.
This kit delivers a significant level of performance (+13mph on U.S. models) through easy to install, bolt-on engine, exhaust, and pump enhancements. Requires use of fresh premium octane pump fuel (91~93).
RIVA Power Filter is installed. Power Filter Kit dramatically increases air flow to your supercharger via a large 4" diameter intake duct and oversized K&N filter element delivering greatly improved acceleration and top speed. Ducting is precision formed from a race proven composite that will not conduct heat to incoming air. Installs securely to supercharger via a tapered velocity stack, silicone coupler and stainless steel clamps. Includes pre-filter element.
RIVA XXX-2 Charger is installed. Complete supercharger assembly features a sophisticated, lightweight 140mm billet impeller that is precision balanced to deliver smooth operation, a billet spacer, machined front & rear housings and RIVA Heavy Duty Clutch Washers. Increased interior volume produces huge performance gains in acceleration and top speed.
RIVA Power Cooler Tube Upgrade Kit is installed. High strength aluminum tubes are shorter than original to minimize boost loss. Rigid aluminum will not swell under pressure like original soft rubber hoses providing improved throttle response & reliability. Includes integrated blow-off valve mount for improved reliability and performance. RIVA/HKS Blow-Off Valve (sold separately) unwanted pressure during off-throttle operation reducing supercharger clutch wear and eliminating heat soak in discharge tube.
RIVA 'GEN-3' Power Cooler is installed replacing original intercooler system. Power Cooler is dramatically more efficient than original intercooler system delivering an increase of 15 peak horsepower with exit temperatures averaging 50?F cooler than stock. Features large, unrestricted core that exhibits minimal pressure loss compared to stock intercooler.
RIVA Intake Manifold Upgrade Kit is installed. Removal of restrictive screen element from inside of intake manifold enables your engine to produce more horsepower through increased boost pressures (+1lb). Special o-ringed, billet block-off plug with integrated fitting for aftermarket boost pressure gauge fills opening left after removal of screen element.
RIVA Fuel Pressure Regulator Kit is installed. Kit provides precision control of fuel pressure to meet fuel requirements of the Riva Stage 4 engine modifications. Plugs directly into original fuel system with OEM connectors and features a large 3/8" fuel return line. Includes integrated liquid-filled pressure gauge and billet Fuel Pressure Regulator Block-Off necessary for removal of stock fuel pressure regulator in fuel tank.
Bosch VT1100 Fuel Injector Kit is installed. High performance 1100cc fuel injector kit supplies modified Sea-Doo engines with the necessary amount of fuel to produce reliable horsepower.
RIVA Valve Train Upgrade Kit is installed. Titanium valve retainers and heavy-duty valve springs increase reliability of modified engine by recucing the possibility of valve float at high RPM. To ease installation of Valve Train Upgrade Kit we offer a unique Valve Compression Tool that allows installation without removal of cylinder head saving you time and money.
RIVA MaptunerX BRP Bundle is utilized to reflash original ECU. MaptunerX provides ability to quickly and easily load performance tunes directly into your stock ECU eliminating downtime that results from shipping for programming. Performance Tunes are calibrated to provide optimum fuel delivery, ignition timing and rev limit to compliment RIVA Racing Performance Kits. OEM dash display, engine diagnostics & engine safety functions are retained. MaptunerX features a full color, touch screen display, ability to restore stock tune settings and access to RIVA's complete tuning library and technical support.
RIVA Open Loop Cooling Kit is installed. Open loop system increases cooling efficiency via steady supply of cool external water dramatically reducing engine operating temperatures for improved performance & reliability.
Solas 'R'-Series Concord Impeller is a special performance impeller offered exclusively by RIVA and RIVA authorized dealers. This impeller is specifically pitched for our specifications using a pitch block to ensure accuracy. Billet impeller cone is included.
83.5mm Reduction Nozzle is installed replacing the standard 87mm reduction nozzle. Smaller exit nozzle compliments the 15/19R pump impeller maximizing performance.
FOR COMPETITION USE ONLY. PRODUCT NOT FOR USE ON POLLUTION CONTROLLED VEHICLES.
These are additional performance upgrade parts that can be purchased individually to improve the performance kit.
- Item Requires Shipping