Search for make, model and part description. Do not include model year in search.
Why Order From Us?

Fast & Free US Delivery

1-Day Handling Time

Always In Stock

Secure Checkout

Sea Doo Exhaust Water Box Muffler Power Valve Piston MANY GSX GTX LRV SP SPX XP


Be the first to review this product



New premium JetSki Plus brand Sea-Doo water box / exhaust piston.

  • Direct replacement part, no modifications needed
  • Replaces the following Sea-Doo part numbers:
    • 420253255
    • 420854440

Note: ONLY fits in the exhaust valve in the rear of the boat, NOT for RAVE valves on the cylinder)

Please ensure your model and year PWCis listed below for proper fitment.
This part will ONLY work on models and years listed below:

ModelĀ  Years
GSX 1996-1999
GTX 1996-1999
LRV 2000
SP 1997
SPX 1997-1999
XP 1996-1999



Write Your Own Review

Only registered users can write reviews. Please, log in or register


Order Processing
  • All products are in stock at our St. Louis Distribution Center
  • Orders ship the next business day

Domestic Shipping Within The 48 States
  • Free shipping for all US locations
  • PO boxes can't be utilized for UPS shipments
  • USPS Express Mail expedited shipping option available

Domestic Shipping Outside The 48 States
  • Free shipping for USPS ship methods
  • Large/Heavy items that ship via UPS can't be shipped outside the 48 states

International Shipping
  • Estimated shipping costs are provided in the shopping cart.
  • Large/Heavy items that ship via UPS can't be shipped internationally