FMF 045632 Factory RCT Slip-On Exhaust Aluminum with Carbon Fiber End Cap - 4.1

The FMF Factory 4.1 RCT (Resonance Chamber Technology) Slip-On Exhaust represents the pinnacle of motocross exhaust engineering, trusted by professional race teams in AMA Supercross and Motocross series. This premium slip-on muffler features a natural finish aluminum canister with a stainless steel mid-pipe and lightweight carbon fiber end cap, delivering both performance and durability for 2019 KTM 250 SX-F applications.

Advanced Resonance Chamber Technology:

• Patent-pending core shape optimizes exhaust pressure wave for maximum power output while reducing sound levels
• Internal duct system increases volume for improved exhaust flow and power gains throughout the entire RPM range
• Redesigned canister maximizes internal capacity for increased packing material volume and longevity
• Proprietary FMF packing blend provides superior durability and sound attenuation

Factory Forward Engineering:

• Shorter overall length reduces susceptibility to crash damage
• Compact design moves the muffler closer to the motor to centralize mass and improve handling
• Aerospace-grade aluminum construction meets FMF's exacting specifications
• 100% manufactured in FMF's Southern California factory

RTS (Rapid Tuning System):

• Snap-ring end cap design allows quick and easy tuning adjustments
• Includes 94dB quiet insert for sound compliance
• U.S. Forestry Service approved spark arrestor screen insert included
• Simple insert changes without disassembly

Performance Benefits:

• Massive power gains throughout the RPM range
• Significant weight savings over stock exhaust at just 7.1 lbs
• Compatible with FMF or OEM headers
• Natural aluminum finish with carbon fiber end cap for race-inspired aesthetics

Note: This exhaust system is designed for closed course competition use only and is not intended for street use. The slip-on configuration makes installation straightforward while delivering professional-level performance enhancement.