RIVA Pro Series Water Box Ultra Series (2008-) Kawasaki RK16091-1

【Compatible models】Kawasaki
ULTRA Series (2008-)

● The Pro Series water box improves horsepower and performance by reducing exhaust restriction and back pressure. Developed on a flow bench, our water box features radial exhaust tubes and end caps for optimal exhaust flow. Its innovative short design allows for supercharger service without removing the exhaust system. High-strength aluminum construction and precision welding ensure durability against backfires and overheating. Powder-coated for corrosion prevention. Detailed English installation instructions included.

Key Features
Up to 10hp gain on modified crafts.
Beaded tube flange for secure coupler retention.
Radial exhaust tubes and end caps.
Powder-coated for corrosion prevention.
For 2008 and later models, the outlet pipe diameter is larger than the genuine part. Therefore, please use a conversion silicone coupler or a free-flow exhaust kit in conjunction.

*2014 Ultra 310
Free Flow Exhaust Kit (RK16110) & coupler (RK15-2.38/3.25) required.

*2011-13 Ultra 300
Free Flow Exhaust Kit (RK16090-08) required.

*2008-10 Ultra 260/250
Free Flow Exhaust Kit (RK16090-08) required.

*2007 Ultra 250
Free Flow Exhaust Kit (RK16090) required.

【Please note】
・If marked "取り寄せ" (backorder) or out of stock, it will take time to prepare.
・As this is an overseas order product, cancellations, returns, and exchanges are not accepted after ordering.