SeaDoo RXT-X GTX 300 Rear Exhaust Kit 2018-2021

Product Overview
Designed specifically for the 2018–2021 Sea-Doo RXT-X 300 and GTX 300 personal watercraft, this high-performance rear exhaust kit is the ideal aftermarket upgrade for riders seeking durability, weight reduction, improved exhaust flow, and a stylish, custom look. Crafted from premium lightweight aluminum, precision-engineered, and rigorously tested for fit, this kit replaces the stock exhaust system—which limits performance—to deliver smoother performance, more responsive throttle, and long-term reliability in harsh marine environments. We also offer a custom titanium upgrade kit for riders seeking the ultimate in performance and durability.

Premium Aluminum Construction: Marine-Grade Durability
Crafted from high-strength, corrosion-resistant aerospace-grade aluminum, this kit is specifically designed to withstand the saltwater, humidity, and constant vibration typical of jet ski use. Unlike fragile OEM plastic or low-quality metal parts—which are prone to cracking, fading, and corrosion—our aluminum design offers superior rigidity, rust resistance, and saltwater corrosion resistance, along with a longer service life—making it ideal for frequent use, saltwater environments, and high-performance riding.

This lightweight aluminum construction also reduces rear-end weight compared to the factory setup, improving the jet ski’s balance, handling, and maneuverability on the water. Each component is CNC-machined and hand-polished to ensure tight tolerances, smooth exhaust flow, and a glossy or matte finish that enhances the aesthetic of your Sea-Doo.

Custom Titanium Upgrade Option
For performance enthusiasts and competitive riders, we offer a full titanium conversion for this exhaust kit. Titanium is the material of choice for high-performance marine components, offering unmatched corrosion resistance (far superior to aluminum in extreme saltwater environments), ultra-lightweight strength, and excellent heat resistance to support prolonged high-speed operation.

This titanium version retains the same precise fit and performance advantages as the aluminum kit while taking durability and weight reduction to the next level—ideal for competitive racing, high-intensity saltwater environments, or long-term premium upgrades. It is a perfect fit for 2018–2021 RXT-X and GTX 300 models, with no compromises in fit or function.

Perfect Fit for 2018–2021 RXT-X 300 and GTX 300 Models
This rear exhaust kit directly replaces the stock components without requiring any modifications, cutting, or custom fabrication. Each kit is precision-engineered to perfectly match the target model’s mounting points, exhaust routing, and dimensions, ensuring a seamless, leak-free installation that’s easy for both professionals and DIY enthusiasts.

All necessary installation hardware, gaskets, and brackets are included, allowing you to quickly and completely replace the stock exhaust system with this high-performance aluminum or optional titanium system.

Key Performance and Functional Benefits
- Improved exhaust flow: The unobstructed, smooth design eliminates stock backpressure, improves engine intake efficiency, and delivers more responsive acceleration on the water.
- Superior Corrosion Resistance: Aluminum withstands saltwater and humid environments; the optional titanium material provides ultimate corrosion protection for the harshest conditions.
- Lightweight Design: Reduces excess weight at the rear, enhancing handling, stability, and maneuverability—especially during sharp turns and high-speed riding.
- Durability: More resistant to cracking, warping, and fading than OEM parts, reducing the need for frequent replacements.
- Enhanced exhaust sound: Produces a deeper, more aggressive sound without excessive noise, highlighting the SeaDoo 300’s powerful engine.
- Weather- and vibration-resistant: Designed to withstand constant water immersion, engine vibrations, and high-speed riding without damage or loosening.