Quality parts you trust
Upgrade your ride. On the water.
High-quality Sea-Doo performance parts and world-leading GT40 ECU products at prices that make sense. Find the right upgrade fast, confirm fitment, and get back on the water.
Know the part number? Search it now325
Sea-Doo power
EST 2018
Fitment checked
World
Wide shipping
Fitment path
Guided
Savings meter
Live
Checkout trust
Secure
Featured upgrade
Sea-Doo 325 Stage 1 Performance Kit
$1,150.00
We ship worldwideQuality parts you trustSea-Doo performanceWorld leader in GT40 ECU
We ship worldwideQuality parts you trustSea-Doo performanceWorld leader in GT40 ECU
GT40 Mobile
Find the right part fast.
The GT40 angle
Fair prices.
Premium marine parts without boutique markups. Clear photos, clear fitment, and sharp pricing make the right upgrade easier to say yes to.
01
Fitment guaranteed
Tell us your ski and we help confirm the right part before you check out.
Buy the part that fits
02
Dyno-proven power
Real numbers on real platforms, so you know what the upgrade is supposed to do.
No mystery gains
03
Real support
Message a builder before or after the sale if fitment, install, or setup is not clear.
Support before checkout
Start here / no guessing
Pick the easy path.
Not sure what fits? Start with the builder. It keeps fitment, savings, and checkout moving in one simple path.
Shop GT40 Marine by builder, ECU, or part search
1Choose your ride
2Only see parts that fit
3Unlock savings and checkout
Shop by machine
Popular paths. Faster buying.
Jump straight into the model and year range most riders ask for, then pick the stage or system that matches the build.
Sea-Doo fitment builder
Build the right package.
Start with the year, then pick the model. The builder filters compatible intake, exhaust, intercooler, catch can, and stage parts so the package total, savings tier, and free shipping progress update as you build.
Selected
2025 RXP-X 325
Power
325 HP
Fitment
2024-2026 RXP-X performance hull
Fitment scan
2025 RXP-X 325
Package savings
Add 2 parts
Free shipping
$99.00 left
Recommended systems
Select compatible parts
0 / 5 systems selected
GT40 ECU / world leader
World leader in GT40 ECU.
GT40Marine sells replacement GT40 ECU products for PCM GT40 5.8, Volvo Penta, and OMC Cobra applications. No repair intake, no troubleshooting queue, no guessing.
Dyno lab / real data
Dyno proven.
Performance air intake, exhaust, intercooler, and Stage kit upgrades should feel practical, not mysterious. Show the power path before the shopper has to ask.
325HP
Peak horsepower
228FT-LB
Peak torque
+25HP
Over stock
8KRPM
Power band
Dyno run / Sea-Doo 300 platform
GT40-DYNO-0312 Stock GT40 Stage 1
Browse by system
Find the part fast.
Already know the system you need? Jump straight into intake, exhaust, catch can, intercooler, Switch, GT40 ECU, or boat support categories.
Bestsellers / in stock
Best-selling parts. Ready to ship.
Popular GT40Marine upgrades pulled from the live catalog: Stage kits, carbon intake, exhaust, catch can, and SuperCooler parts.
Guides / install help
Buy the part. Know the path.
Performance shoppers want more than a product grid. Give them stage explanations, install context, and fitment confidence before they hit checkout.
Community / the GT40 fleet
Seen by the marine crowd.
Built for riders, builders, and marine owners who want the right part without a maze of menus.
500+
Skis built
12
Systems supported
7
Years running
Compatible with
Marine systems and builders we support
Customer Sea-Doo build
GT40 engine bay
Fitment help
Need the right part?
Send your machine details when fitment is the only thing stopping the order. We will point you toward the right ECU, Sea-Doo upgrade, or support part.
GT40 ECU fitment
Sea-Doo stage kits
Switch performance
Boat support parts
Need help?
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Fitment support online Fast order support