HP
Typical planning range: +50 to +70 HP with full setup review
Rotax 1630 ACE 300 / 2016-2025
Sea-Doo 300 Stage 3 Performance Kit
The higher-output 300 HP path built from Stage 2 with waterbox and SuperCooler support.
Price
$2,150
Live kit price
Install
Advanced
8-12 hours plus setup
What you get
Included GT40 SKUs
GT40-SD-STG2-300
Stage 2 package
GT40-SD-WB-2020
Waterbox
GT40-SD-SUPERCOOLER
SuperCooler
300 model paths
Choose the right hull
Torque
Build-dependent; prop and tune setup matter
Boost
Tune/setup review required before final use
Recommended for
300 HP riders planning a serious build
Owners ready for tune and setup review
Riders who already understand supporting hardware requirements
| Feature | Stage 1 | Stage 2 | Stage 3 |
|---|---|---|---|
| 4 inch Intake | Included | Included via Stage 1 | Included via Stage 1 |
| Catch Can Kit | Included | Included via Stage 1 | Included via Stage 1 |
| Intercooler Tubing / BOV Kit | Included | Included via Stage 1 | Included via Stage 1 |
| Model-matched rear exhaust | Next step | Included | Included via Stage 2 |
| Waterbox | No | Stage 3 step | Included |
| SuperCooler | No | Stage 3 step | Included |
FAQs
Does Stage 3 require a tune?
Yes. Treat Stage 3 as a tune-required build path.
Is Stage 3 right for a stock ski?
Stage 3 should be planned after the supporting parts and installer path are clear.
Can GT40 help check the build list?
Yes. Use exact model, year, and current modifications when asking for build review.
How fast does the kit ship?
In-stock GT40 parts normally ship from the current GT40 fulfillment queue. Check the product page before checkout for live availability.
Will this affect my factory warranty?
Any performance modification can affect factory warranty coverage. Confirm with your dealer and installer before modifying a new craft.
Can GT40 help confirm my exact model?
Yes. Use your exact year, model, and engine when ordering so the GT40 team can confirm the correct fitment path.