A performance slip-on muffler that provides an edge. That's how Yoshimura describe their newest slip-on offering for the KTM SX-F and Husqvarna FC dirt bikes.

This stainless/aluminium Signature Series RS-12 slip-on not only provides additional power, but it increases the torque on your SX-F or FC. Yoshimura even took the extra step to include a USFS approved spark arrestor in every slip-on, giving you peace of mind when you're headed out to the wilderness. With the SA-19-K spark arrestor, your bike will be noticeably quieter, and when you're out in the deep, everyone can appreciate less dB's.

Want to remove the sparky and head to an MX track? No problem! Pull out the PTF insert system that makes it a breeze to install and remove spark arrestor or low volume insert.

Weight: RS-12 stainless/aluminum muffler w/spark arrestor: 7.6 lbs. VS Stock muffler: 6.1 lbs.

SA-19-K Spark arrestor is included and installed.

RS-12 Features and benefits:

• Aggressive intelligently designed, the RS-12 asymmetrical shaped muffler allows maximise capacity and incorporates a resonance chamber for managing sound and increasing usable power. RS-12's unique profile also provides more clearance for tyre and brake calliper.
  
• Improved performance gains with refined linear power delivery.
• Just like the works systems our Factory Racers use, RS-12 systems utilise precision machined joints. Machined joints provide a superior and exacting fit for joints by better securing the seal between two surfaces with a perfect 360 degree contact surface which translates into improved system life, fit and performance.
• New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arresters.
• Works-look matte carbon fibre end cap with industry leading design, innovation and detailing as expected from Yoshimura.
• Carbon end cap covers the RS-12 inner cap, thus improving looks, while providing easier service as compared to other sandwich mounting designs most commonly found in the industry.
• Proudly designed, developed and made in the USA!
• Repack Kits, optional Inserts and Spark Arresters are available for all models

ADDITIONAL INFORMATION

VIEW INSTALLATION INSTRUCTIONS

BIKE FITMENT

GASGAS

• EX 250F 2024-2025
  
• EX 350F 2024-2025
• EX 450F 2024
• MC 250F 2024-2026
• MC 350F 2024-2025
• MC 450F 2024-2026

HUSQVARNA

• FC 250 2023-2026
• FC 350 2023-2025
• FC 450 2023-2026
• FX 350 2023-2025
• FX 450 2023-2024

KTM

• 250 SX-F 2023-2026
• 250 XC-F 2023-2026
• 350 SX-F 2023-2026
• 350 XC-F 2023-2025
• 450 SX-F 2023-2026
• 450 XC-F 2023-2026