YAMAHA MT-09 (2021-2023)STR-1 muffler, with full 3-1 exhaust system Stainless Steel Aisi 304 - Euro 5


Your investment






Part Number: Y37A-C135MB


Line Full exhaust system 3-1
Headers Material Stainless Steel AISI 304
Body Material Stainless Steel Aisi 304
End Cap Material Stainless Steel Aisi 304
Frame attachment Bracket
Lambda probe Yes
Homologation – EC, TUV approved Yes - street legal - EURO 5
Approval Certificate Yes
World Leading Homologation Approved Development EURO 5
Certified EU Approved (Euro 5) Stringent Noise and Emissions Compliance Yes
Compliant to Australia Noise Regulations Yes
Weight   -0.5Kg (SC 6.5 Kg / STOCK 7 Kg)
Power   +3.1 hp @ 9750 rpm
Torque   +2.5 Nm @ 9750 rpm



The new STR-1 exhaust is the last creation of SC-Project R&D Department and represents a full step forward in terms of tuning process of the new Yamaha MT-09.

To combine perfectly the aesthetic of the bikes originally designed and produced with low-position exhaust – sometimes totally positioned under the engine – it has been necessary to project and develop a new solution: the answer is the new and innovative STR-1 exhaust.

Great attention has been dedicated to performance optimization and sound output, which is a real “must” for the 3-cylinders Yamaha engines and for all SC-Project products.

The full-system for the MT-09 has been manufactured with high-quality stainless steel AISI 304 and with top level quality finishes that this bike deserves. All couplings are guaranteed by male / female bushings that ensure a perfect seal, with special T.I.G weldings handcrafted in protected environment. The option “black color” is made with a special ceramic paint process to resist to high temperatures. The specific carbon fiber cover is manufactured with autoclave process to offer a unique style and harmonic design.

The STR-1 full system for Yamaha MT-09 allows to save 0,5 kilograms and to gain an outstanding maximum increase of 3.1 hp and 2.5 Nm of torque at 9.700rpm (if compared to the original system), with a sensible improvement of throttle response and riding experience throughout the engine delivery range, in the total respect of Euro5 regulations.

The installation is plug&play and ECU remapping is not required.
For racing use only, it is possible to remove the catalytic converter.
The removal of the catalytic converter does not meet the Euro 5 regulations.

  • Slip-On muffler
  • Full AISI 304 stainless steel 3-1 Exhaust System
  • Carbon fiber heat protection
  • Springs and screws
  • SC-Project stickers
  • 24 months SC-Project official warranty
  • Homologation card

Special Order: Backorder required. Not currently available in the SC-Project Australian Warehouse, packed full of other options

Availability: SC-Project is 100% Made In Italy. This product is usually received within 3-7 weeks and Ready for immediate dispatch!

Insurance: Insurance on our deliveries is guaranteed. Orders are dispatched by Registered Post with insurance included. BOTH FREE!

Payment Method: Afterpay, Credit Card, PayPal and PayPal (Pay In 4) are all welcome.

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