Factory 4.1 RCT Slip-On Exhaust Silencer 15-19 KTM Husqvarna 250 350 450 500 501 - FMF 045594

The FMF Factory 4.1 RCT Stainless Slip-On with Carbon End Cap integrates advanced FMF Resonance Chamber Technology™ both inside and outside the exhaust, delivering superior power across the RPM range. Its compact design is engineered to be less vulnerable to damage, with Factory Forward Engineering centralising mass for enhanced handling. Meticulously manufactured in Southern California using aerospace-grade materials, this slip-on exhaust offers substantial weight savings and incorporates the Rapid Tuning System (RTS), ensuring it meets the requirements of performance-oriented riders.

Features

• Closed course use only
• Incorporates FMF Resonance Chamber Technology™ internally and externally
• Factory Forward Engineering positions muffler closer to the motor for optimal mass centralisation
• Crafted from a proprietary alloy blend to FMF’s stringent aerospace standards
• Natural aluminium finish with a carbon end cap for strength and style
• Massive power gains throughout the RPM range
• Substantial weight reduction over stock systems (total weight: 4.3 lbs)
• RTS (Rapid Tuning System) for easier adjustments
• Includes screen-type spark arrestor insert
• 94dB quiet insert included
• Designed and built 100% in Southern California

Specifications

• Item ID: 045594
• Type: Slip-On
• Configuration: Single
• Construction: Aluminium
• Finish: Natural
• End Cap: Carbon
• Spark Arrestor: Screen Insert (included)
• Quiet Insert: 94dB Insert (included)
• Weight: 4.3 lbs
• Not for road use; closed course only
• No carburettor warning

Vehicle Fitment

Husqvarna

• FC 250 (2016–2018)
• FC 350 (2016–2018)
• FC 450 (2016–2018)
• FE 250 (2017–2019)
• FE 350 (2017–2019)
• FE 450 (2017–2019)
• FE 501 (2017–2019)
• FX 350 (2017–2018)
• FX 450 (2017–2018)

KTM

• 250 EXC-F (2017–2019)
• 250 SX-F (2016–2018)
• 250 SX-F Factory Edition (2015–2017)
• 250 XC-F (2016–2018)
• 350 EXC-F (2017–2019)
• 350 SX-F (2016–2018)
• 350 XC-F (2016–2018)
• 450 EXC-F (2018–2019)
• 450 EXC-F Six Days (2017–2019)
• 450 SX-F (2016–2018)
• 450 SX-F Factory Edition (2015–2017)
• 450 XC-F (2016–2018)
• 500 EXC-F (2017–2019)