Yoshimura 265000S320 2020-2023 KTM 500 EXC-F / Husqvarna FE 501 RS-12 Full Exhaust — +21% HP Gain

Yoshimura — High-Torque Dual Sport Delivery, Uncork the Ultimate Off-Road Weapon

Dual sport riders often find the KTM 500 EXC-F and Husqvarna FE 501S are held back by restrictive, choked-out exhaust systems designed for emissions rather than performance. This "corked" feeling results in sluggish throttle response and a lack of the raw grunt needed to loft the front wheel over logs or power through deep sand. The Yoshimura RS-12 Full System is the definitive solution, engineered specifically to transform these large-displacement machines into true performance powerhouses.

The dyno numbers speak for themselves: a massive 21.8% increase in peak horsepower and a 15% boost in peak torque. Built with "Factory Quality" precision, the RS-12 features machined joints for a leak-proof seal and an asymmetrical muffler profile that provides maximum clearance for the rear brake caliper and tire. The header and mid-pipe are pushed forward for superior weight centralization, ensuring your Husqvarna FE 501 remains nimble on tight single-track trails while delivering a aggressive, race-ready exhaust note.

• Dyno-Proven Gains: Dramatic 21.8% HP increase and 15% more torque for tackling technical terrain.
• Factory Quality Machined Joints: Ensures an exacting 360-degree fit for increased system life and durability.
• USFS Approved Spark Arrester: Includes a pre-installed, trail-legal spark arrester for public land riding.
• Weight Centralized Design: Tapered muffler body moves mass toward the center of the bike for better handling.
• Matte Carbon Fiber End Cap: Features an innovative inner-cap mount for easier servicing and a "Works" factory look.
• SKU: 265000S320

Moto-House MX Pro Tip:

Please note that because the RS-12 is designed for maximum flow and volume, the muffler outlet sits directly in line with the stock KTM and Husqvarna rear blinkers. To prevent your turn signals from melting, you must install a blinker relocation kit or low-profile LED signals before your first ride.

Year	Make	Model
2020-2023	KTM	500 EXC-F
2020-2023	Husqvarna	FE 501 / FE 501S

FAQ Questions

Q) Is this exhaust legal for trail riding?
A) Yes, this RS-12 Enduro Series system includes a USFS-approved spark arrester, making it legal for use on public lands and off-road parks.

Q) Will this fit with my stock turn signals?
A) No. The factory turn signals must be relocated or replaced with flush-mount versions, as the high-exit exhaust gases will damage the stock blinker housings.

Q) What is the benefit of the Machined Joints?
A) Unlike standard swedged joints, Yoshimura's "Factory Quality" machined joints provide a superior contact surface that prevents exhaust leaks and makes removing the muffler for maintenance much easier.

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