This modification delivers the maximum level of performance (+5 mph) through easily installed air intake, exhaust, and pump enhancements. No internal engine modifications are required.

RIVA Performance Power Filter is installed providing greatly improved performance by replacing restrictive stock intake system. Includes two smaller K&N filters for engine case breather system along with a water repellant pre-filter cover for primary filter.

RIVA STXF Free Flow Exhaust System is installed replacing restrictive secondary muffler. Engine performance is improved by reducing back pressure and harmful detonation. Formed aluminum exhaust tube is lightweight and powder coated to resist corrosion. Includes billet exhaust tip and high temperature silicone couplers. Waterbox modification is not necessary.

R&D STXF Ride Plate is installed. Ride plate provides quicker planing and increased top speed by trimming nose up for reduced drag. Also improves handling and reduces porposing with superior design.

Solas KG-CD-14/21 Concord Impeller is installed. This impeller is ideally pitched to compliment the RPM Kit delivering increased acceleration and top speed. Billet impeller cone is included.

RIVA Pro-Series Sponsons are installed. Our sponsons dramatically improve the handling of the 15F with superior blade & backing plate design. Sponson depth is adjustable to accommodate riding style.

Note: Stock intake grate was utilized for maximum top speed. R&D STX-F intake grate part # 111-15001 can be used for increased hook up in rough conditions, but top speed may be reduced by as much as 2 mph (+/-) in smooth water.