The Sea-Doo RXP-X 325 is the pinnacle of factory performance watercraft. But if you want to push it further, these five bolt-on modifications will give you the biggest gains for your money.
1. Cold Air Intake — $189-$299
The easiest and most impactful first mod. A high-flow cold air intake replaces the restrictive factory airbox, letting your supercharged engine breathe easier. Expect 5-10 HP gains with a noticeable improvement in throttle response. Our carbon fiber intake is the most popular choice for 325 owners.
2. Intercooler Tubing Upgrade — $299
Factory intercooler piping is made of rubber that expands under boost pressure. Upgrading to mandrel-bent aluminum tubing with a blow-off valve (BOV) maintains consistent boost pressure and reduces intake temperatures. This alone is worth 5-8 HP.
3. Rear Exhaust Kit — $510-$550
Opening up the exhaust is critical for top-end power. Our GT40Marine 325 Shorty Water Box reduces backpressure and lets the engine rev more freely. Expect 8-12 HP gains and a more aggressive exhaust note.
4. SuperCooler Upgrade — $645.95
The GT40 SuperCooler dramatically reduces intake air temperatures, which means denser air charge and more consistent power, especially in warm conditions. Essential if you ride in hot climates.
5. Stage 1 Performance Kit — $1,150
Why buy separately? Our Stage 1 kit bundles the intake, intercooler tubing, and BOV together at a discount. It's the smart way to get started with modifications and can net you 20-30 HP over stock.
The Bottom Line
Start with a Stage 1 kit for the best value. If you want to go further, add the exhaust and SuperCooler. With all five mods, you're looking at 40-60+ HP over stock — and the RXP-X 325 will be an absolute weapon on the water.
