YAMAHA MT09/XSR900 2021-2025: LOW DE-CAT AND FULL SYSTEM EXHAUST SYSTEMS

Description

Yamaha MT-09 / XSR900 Low Mount Exhaust System (2021–2025)

Available in De-Cat and Full System Options

Upgrade your Yamaha MT-09 or XSR900 with the Low Mount Race Exhaust System. Available as either a De-cat System or a Full System with titanium headers, this exhaust delivers a dramatic improvement in sound, performance, and weight reduction—all while keeping a low-profile, race-inspired aesthetic.

✅ Choose Your Configuration:

De-Cat System (uses OEM headers)

• Replaces the muffler and mid-section (catalytic converter)

• Retains original headers

• Requires cutting stock headers for installation (instructions provided)

• Ideal for riders who want increased performance and aggressive sound without replacing the full header system

Full System (includes titanium headers)

• Replaces the entire system: muffler, mid-section, and headers

• Bolt-on design — no cutting required

• Made from aerospace-grade titanium with immaculate welds

• Extremely lightweight:

  • Stock Weight: 7kg

  • AR Full System Weight: 2.4kg

  • Weight Saving: 4.6kg

• Header pipes will naturally blue/purple with heat over time

• While not essential, using an UpMap Unit is recommended to extract maximum performance

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🔧 Key Features:

• Material: Handcrafted from titanium for unmatched durability, heat resistance, and minimal weight

• Dynamic Flow Design: Improves exhaust gas flow for sharper throttle response and better power delivery

• Power Gains: Expect a 2–4 bhp increase; greater gains with ECU remap or PCV tuning

• O2 Sensor Ready: The 2024+ models include an O2 sensor port—select your model year when ordering

• Optional Refit: Need to return to the stock de-cat setup? Check out our [Refit Page]

🎨 Exhaust Tip Options:

• GP1R – 60mm angular tip in Black or Pure Titanium

• GP2R – Compact 110mm carbon can (no dB killer available)

• V3 – 150mm can in either Black Ceramic or Titanium

• GP1 Carbon Sleeve – A carbon-wrapped titanium can, built to last a lifetime

📊 Specifications:

• Weight: TBC (Full system = 2.4kg, stock = 7kg)

• Noise Levels @ 4500 RPM:

  • Stock Exhaust: 96 dB

  • GP3 Can: 104 dB

⚠️ Important Notes:

Road Use: Non-homologated exhaust systems may not comply with local road regulations and are intended for race use only. Noise levels can vary significantly, from standard to extremely loud. Please review the specifications carefully before ordering. If you have any questions or need assistance, feel free to contact us.

Build Times: Our exhausts are built to order, with delivery times ranging from 6 to 10 weeks for standard systems and 10 to 15 weeks for more complex full systems. For the latest estimated delivery times, please visit Current Build Times. These timeframes reflect the handcrafted nature of our exhausts, which are produced by a small team in the UK, as well as the high demand for these limited products.

Exhaust Types:

1. Slip-On Exhausts – Replace the original muffler, leaving the mid-section and headers untouched. A simple way to enhance sound and looks.

2. De-cat Systems – Replace the muffler and mid-section, keeping the OEM headers. Boosts performance and drops weight.

3. Full Systems – Replace all components: muffler, mid-section, and headers. Offers the most aggressive weight and performance gains.

Each system is designed to suit different performance, sound, and styling preferences. Not sure which is right for you? Contact us—we’re happy to help!

Design Updates: Our exhausts are handcrafted to order and constantly improved. Final products may vary slightly from the images shown, reflecting minor design enhancements that come with custom fabrication.