× Does not fit
RXP-X 300 Rear Exhaust Kit 2016-2019
For the RXT-X 300: 2018+ RXT-X / GTX Single Rear Exhaust Kit (2018–2023)
GT40 Marine / Upgrade guide
Sea-Doo RXT-X 300.Upgrades that fit.
13 GT40 parts matched to the 2016–2023 RXT-X 300, from the intake to the exhaust. Set your model year to check every part against your exact ski.
- Engine
- Rotax 1630 ACE
- Power
- 300 hp
- Model years
- 2016–2023
- Hull
- S3 (2016-2017); ST3 (2018-2023)
Sea-Doo · 300 hp13 parts
Set your RXT-X 300 model yearEvery part below will show its fit verdict for that exact year.
01 / Intake
Cold air intakes
All 6 GT40 intakes fit the RXT-X 300 for 2016–2023. They share the same application and differ in build and finish, so choose the look you want.
Cold air intakeFits 2016–2023
Black Silicone Cold Air Intake
Black silicone elbow · shorty filter
$149
Cold air intakeFits 2016–2023
Blue Silicone Cold Air Intake
Blue silicone elbow · shorty filter
$149.99
Cold air intakeFits 2016–2023
Red Silicone Cold Air Intake
Red silicone elbow · shorty filter
$149.99
Cold air intakeFits 2016–2023
Silicone Cold Air Intake with Shorty Blue Filter
Silicone elbow · shorty blue filter
$149.99
Cold air intakeFits 2016–2023
Silicone Cold Air Intake with Carbon Fiber Coupler
Silicone elbow · carbon fiber coupler
$175
Cold air intakeFits 2016–2023
Full Carbon Fiber Cold Air Intake
Full carbon fiber
$239
02 / Boost tubing
Intercooler tubing and BOV
GT40 tubing kits pair new intercooler tubing with a blow-off valve. This is the kit matched to the 300 hp RXT-X 300.
Tubing + BOVFits 2016–2023
230/300 Intercooler Tubing + BOV Kit
Intercooler tubing · blow-off valve
$249
03 / Intercooler
Intercooler
The SuperCooler is GT40's intercooler for supercharged Sea-Doo models, supplied as one complete assembly.
IntercoolerFits 2016–2023
GT40 SuperCooler
Complete intercooler assembly
$475
04 / Exhaust
Exhaust and waterboxes
Waterbox and rear exhaust parts change with model year, so the right one depends on your ski. Set your year above or check the years on each part.
ExhaustFits 2016–2019
Pre-2020 Waterbox Exhaust
Waterbox exhaust
$419.99
ExhaustFits 2018–2023
2018+ RXT-X / GTX Single Rear Exhaust Kit
Single rear exhaust kit
Confirm RXT-X 300 2016–2017 with GT40
2023+ ST3 hulls require Siphon Break Delete Kit.
$420
ExhaustFits 2020–2023
2020+ Shorty Water Box
Shorty water box · rear exhaust sold separately
$420
05 / Catch can
Catch cans
The GT40 catch can kit includes a K&N breather, a Sea-Doo mounting bracket and the hardware to fit it.
Catch canFits 2016–2023
4-TEC Catch Can Kit
K&N breather · bracket and hardware included
$135
06 / Ribbon delete
Ribbon delete
The ribbon delete kit ships with the hole saw and arbor, seals and mounting hardware.
Ribbon deleteFits 2016–2023
Ribbon Delete Kit
Hole saw, arbor, seals and hardware included
$169.99
By model year
What changes by year
These parts cover only some RXT-X 300 model years. Everything else on this page fits 2016–2023.
| Part | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|
| Pre-2020 Waterbox Exhaust | Fits | Fits | Fits | Fits | No | No | No | No |
| 2018+ RXT-X / GTX Single Rear Exhaust Kit | Confirm | Confirm | Fits | Fits | Fits | Fits | Fits | Fits |
| 2020+ Shorty Water Box | No | No | No | No | Fits | Fits | Fits | Fits |
FitsConfirm with GT40Not for that year
Check before you buy
Not for the RXT-X 300
These GT40 parts are built for other models and do not fit the Sea-Doo RXT-X 300.
Good questions. Clear answers.
Know what fits before you order.
Every answer here comes from the same fitment data as the product pages. Modified ski, or a part that says to confirm? Ask before you order.
support@gt40marine.com(360) 453-7392Which cold air intake should I get for my RXT-X 300?
All 6 GT40 intakes fit the 2016–2023 RXT-X 300, so choose by build and finish: Black Silicone Cold Air Intake ($149), Blue Silicone Cold Air Intake ($149.99), Red Silicone Cold Air Intake ($149.99), Silicone Cold Air Intake with Shorty Blue Filter ($149.99), Silicone Cold Air Intake with Carbon Fiber Coupler ($175) and Full Carbon Fiber Cold Air Intake ($239).
Which waterbox or rear exhaust fits my RXT-X 300?
It depends on the model year. The Pre-2020 Waterbox Exhaust fits 2016–2019. The 2018+ RXT-X / GTX Single Rear Exhaust Kit fits 2018–2023 (confirm 2016–2017 with GT40). The 2020+ Shorty Water Box fits 2020–2023.
What else do I need for the 2018+ RXT-X / GTX Single Rear Exhaust Kit on a RXT-X 300?
2023+ ST3 hulls require Siphon Break Delete Kit. Check whether your ski already has it before you order.
Will the RXP-X 300 Rear Exhaust Kit 2016-2019 fit my RXT-X 300?
No. It is built for other models. For the RXT-X 300, use the 2018+ RXT-X / GTX Single Rear Exhaust Kit (2018–2023).
How do I check a part for my exact year?
Set your model year at the top of this page. Every part then shows its fit verdict for that year, and the shop link lists every GT40 part for your RXT-X 300.
What if my RXT-X 300 is already modified?
The fit shown is for each model year's factory setup. If the intake, exhaust or cooling has been changed, send your year and current parts to support@gt40marine.com or call (360) 453-7392 before you order.