Waterboxes
Shopping for the waterbox itself? Review the WaterBox listing and check your existing connections. A waterbox and a rear exhaust kit are separate products.
GT40 Marine / Sea-Doo
Sea-Doo exhaust.Your build, connected.
Waterbox, rear exhaust, or outlet? Start with the section you want to change, then match the part to your Sea-Doo and its existing setup.
Exhaust & waterboxes
Sea-Doo 2020+ Shorty Water Box
The collection
4 parts to exploreExhaust & waterboxes
Make it specific to your ski.Choose your model and year to narrow the collection.
Before you choose
Choose the right section.
Rear exhaust & outlets
Shopping for the section toward the hull outlet? Compare rear exhaust kits and outlets by exact application. Spark and RXP-X products have their own fitment.
Good questions. Clear answers.
Know what you're ordering.
Exact model. Exact year. Existing modifications. Those details help you choose the right part.
WaterBox buying checklistIs a waterbox the same as a rear exhaust kit?
No. The waterbox, rear exhaust section and outlet are distinct components. Order the component you need and check whether the parts already on your ski have been changed. Do not assume every product includes the other sections.
How do I choose a Sea-Doo exhaust for my ski?
Select the exact model and year, then read the fitment on the product page. Engine power alone does not identify the hull or exhaust routing. If your waterbox or exhaust has already been modified, share that information with GT40 before ordering.
Can I use the same exhaust on a Spark and an RXP-X?
Use the product listed for your exact application. The Spark 2-Up rear exhaust and RXP-X rear exhaust are separate listings; a shared Sea-Doo badge does not establish interchangeability.