Developed on our Dyno and tested extensively on the water, this waterbox features radiused exhaust tubes and end caps for optimum exhaust flow. Unique exhaust baffle will increase the low-end power and mid-range pull of your Kawasaki Watercraft. Delivers up to 15hp on modified engines along with sig...

Improves engine performance by reducing back pressure and harmful detonation. Replaces the restrictive secondary waterbox located between the primary waterbox and hull exit on your watercraft. High quality aluminum exhaust tube will survive meltdowns & backfires. The mandrel bent tubing is powder co...

Required when installing RIVA Kawasaki Ultra Pro-Series Water Box in conjunction with RIVA Kawasaki Ultra 310 Free Flow Exhaust Kit RK16110....

Our Exhaust Race Plate allows easy removal of restrictive honeycomb element on Ultra 300 for competition use. OEM exhaust element is located inside exhaust manifold obstructing exhaust flow and producing excessive heat. Installation of Race Plate increases horsepower and reduces under-hood operating...

Directly replaces the OEM exhaust outlet on Kawasaki STX-F & Ultra models when combined with additional components that bypass or eliminate the stock rubber exhaust hoses and secondary waterbox. Constructed from billet aluminum, anodized to prevent corrosion & laser etched for style. NOTE: Does n...

High quality mandrel bent aluminum exhaust tube will survive meltdowns & backfires. Replaces soft rubber exhaust hose with sturdy aluminum tubing. Includes billet exhaust outlet with laser etched graphics that is anodized to prevent corrosion. High temperature silicone couplers included along with d...

Enables you to bypass or remove secondary muffler (weight savings of +10lbs) improving engine performance by reducing back pressure and harmful detonation. Mandrel bent aluminum exhaust tube is lightweight and powder coated to resist corrosion. High temperature silicone couplers included with detail...