HP
Typical planning range: +25 to +40 HP with tune-matched setup
Rotax 1630 ACE 300 / 2016-2025
Sea-Doo 300 Stage 2 Performance Kit
Stage 1 plus the model-matched rear exhaust for 300 HP Sea-Doo riders building past the first step.
Price
$1,250
Live kit price
Install
Intermediate
5-8 hours
What you get
Included GT40 SKUs
GT40-SD-STG1-300
Stage 1 base package
GT40-SD-EXH-RXP-2021PLUS
RXP-X Rear Exhaust
GT40-SD-EXH-ST3
RXT-X / GTX Rear Exhaust
300 model paths
Choose the right hull
Torque
Stronger midrange under repeated acceleration
Boost
Mild-tune boost range; confirm with tuner
Recommended for
Riders ready to move past Stage 1
Owners adding the correct rear exhaust for their hull
Builds that need stronger repeated-pull consistency
| 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
Is this the right kit after Stage 1?
Yes. Stage 2 adds the model-matched rear exhaust to the Stage 1 base.
Does Stage 2 include every possible upgrade?
No. Stage 2 is Stage 1 plus rear exhaust. Stage 3 adds waterbox and SuperCooler.
Should I check fitment before checkout?
Yes. Confirm exact year, model, and any existing modifications before buying.
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.