Provides a power gain of up to 15 Hp
Note: Not designed to be used with supercharged Ultra LX models.
Delivery within 3 at 5 days
Warning: Last items in stock!
Developed on our Dyno and extensively tested on water, this water box features rounded exhaust tubes and tips for optimal exhaust flow. The unique exhaust baffle will increase the low-end power and mid-range traction of your Kawasaki Watercraft. Makes up to 15hp on modified engines with significant torque gains. High strength aluminum construction will survive flashback and lightning. Powder coated to prevent corrosion. A must for modified engines. Includes detailed installation instructions.
2014 & Newer Ultra 310: Eliminates the 2nd restrictive water box. Requires RIVA free flow exhaust kit (part # RK16110) and RK15-2.38/ 3.25 coupler.
2011 ~ 13 Ultra 300: Direct replacement for original water box. Use with standard exhaust pipe or RIVA free flow exhaust kit (part # RK16090-08).
Models 2008 ~ 10 Ultra 260/250: Replaces the original restrictive water box. Requires RIVA free flow exhaust kit (part # RK16090-08).
Models 2007 Ultra 250: Eliminates the second restrictive water box. Requires a RIVA free flow exhaust kit (part # RK16090).
The Riva Racing water box is compatible with the following Kawasaki jet skis:
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