FMF 041632 Factory 4.1 RCT 4-Stroke Slip-On Muffler

The FMF Factory 4.1 RCT is a premium slip-on muffler engineered for serious 4-stroke motocross and off-road riders who demand race-proven exhaust performance. Built with FMF's patented Resonance Chamber Technology (RCT), this muffler is designed to broaden the powerband while reducing unwanted noise resonance for a more controlled and refined power delivery.

Constructed from lightweight titanium, the Factory 4.1 RCT delivers a significant weight savings over the stock exhaust system without sacrificing durability. The precision-welded construction and high-temp finish are built to withstand the rigors of aggressive riding and race conditions.

Key Features:

• Resonance Chamber Technology (RCT) – reduces mid-range resonance and broadens usable power
• Titanium construction – ultra-lightweight design for improved power-to-weight ratio
• Slip-on design – direct OEM replacement with no additional modifications required
• Spark arrestor compatible – meets forestry and off-road land use requirements
• Race-proven performance – developed and tested by FMF's factory race team
• High-temp coating – resists corrosion and discoloration under extreme heat

The FMF Factory 4.1 RCT muffler is a top choice for competitive motocross and off-road riders looking to upgrade exhaust sound, reduce weight, and improve overall engine performance. FMF part number 041632.