Kawasaki Ultra 250 260 300 310 Water Box

$448.54

Additional information

Weight 32 lbs
Dimensions 11 × 8 × 10 in
OEM Part #

RK16091-1, 49070-3747, 49070-3748, 49070-3752, 49070-3757, 49070-0749, 49070-0750

Developed on our inhouse Dyno and tested extensively on the water, this waterbox features radiused end caps & exhaust tubes 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 significant torque gains. High-strength aluminum construction will survive backfires and meltdowns. Powder coated to prevent corrosion. A must for modified motors. Includes detailed installation instructions.

Key Features:

  • Delivers up to 15hp on modified craft.
  • Machined hose flanges for reliable coupler retention.
  • Radiused exhaust tubes & end caps.
  • Powder coated to prevent corrosion.

Additional Application Requirements:

  • 2014 & Newer Ultra 310: Eliminates restrictive 2nd waterbox. Requires RIVA Free Flow Exhaust Kit (part# RK16110) and coupler RK15-2.38/3.25.
  • 2011~13 Ultra 300: Direct replacement for original waterbox. Use with stock exhaust outlet hose or RIVA Free Flow Exhaust Kit (part# RK16090-08).
  • 2008~10 Ultra 260/250 models: Replaces restrictive original waterbox. Requires RIVA Free Flow Exhaust Kit (part# RK16090-08).
  • 2007 Ultra 250 models: Eliminates restrictive 2nd waterbox. Requires RIVA Free Flow Exhaust Kit (No ex tip-part# RK16090). Complete Free Flow Exhaust Kit (part# RK16110) and coupler RK15-2.38/3.25)

KP offers upgraded hose clamps for this kit here.

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