FMF - Factory 4.1 RCT Complete System (Gas Gas)
FMF – Factory 4.1 RCT Complete System (GasGas)
The FMF Factory 4.1 RCT Complete System is built for GasGas riders who want stronger power, a lighter feel, and cleaner throttle response across the entire RPM range. Using FMF’s latest Resonance Chamber Technology inside and outside the canister, this system controls sound while improving flow, giving you a noticeable performance boost without excess noise. The shorter muffler design works with FMF’s Factory Forward Engineering, keeping the weight tucked in tight to the engine for better balance and less chance of damage in a crash. It’s built from aerospace-grade materials and manufactured start-to-finish in FMF’s Southern California facility.
Why We Like It
It gives GasGas four-strokes a more responsive feel without making the bike overly loud. The mass-centralized design makes the bike handle lighter, and the Megabomb header adds smooth, usable power everywhere. The construction is clean, durable, and very “factory”—a top-tier exhaust setup that fits and performs exactly how it should.
Why It’ll Work for You
If you want stronger low-to-top power and a lighter, more balanced feel, this system makes an immediate difference. The patented chamber and canister designs increase flow and manage sound better than a standard slip-on, while the shorter length helps keep your exhaust out of harm’s way. It bolts on easily, works with tuning inserts or a spark arrestor, and is optimized specifically for GasGas engines.
Key Features
-
Latest FMF Resonance Chamber Technology (internal + external)
-
Patented core shape reduces sound while maintaining maximum power
-
Patented canister shape increases internal volume for better sound absorption
-
Patented chamber design refines exhaust pressure and improves flow
-
Factory Forward Engineering for mass centralization and reduced crash damage
-
Application-specific tuned exhaust core
-
Rear endcap accepts tuning inserts or spark arrestor
-
Includes Titanium Megabomb header for optimized power output
- Carbon fiber end cap
Original: $944.99
-70%$944.99
$283.50Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
FMF – Factory 4.1 RCT Complete System (GasGas)
The FMF Factory 4.1 RCT Complete System is built for GasGas riders who want stronger power, a lighter feel, and cleaner throttle response across the entire RPM range. Using FMF’s latest Resonance Chamber Technology inside and outside the canister, this system controls sound while improving flow, giving you a noticeable performance boost without excess noise. The shorter muffler design works with FMF’s Factory Forward Engineering, keeping the weight tucked in tight to the engine for better balance and less chance of damage in a crash. It’s built from aerospace-grade materials and manufactured start-to-finish in FMF’s Southern California facility.
Why We Like It
It gives GasGas four-strokes a more responsive feel without making the bike overly loud. The mass-centralized design makes the bike handle lighter, and the Megabomb header adds smooth, usable power everywhere. The construction is clean, durable, and very “factory”—a top-tier exhaust setup that fits and performs exactly how it should.
Why It’ll Work for You
If you want stronger low-to-top power and a lighter, more balanced feel, this system makes an immediate difference. The patented chamber and canister designs increase flow and manage sound better than a standard slip-on, while the shorter length helps keep your exhaust out of harm’s way. It bolts on easily, works with tuning inserts or a spark arrestor, and is optimized specifically for GasGas engines.
Key Features
-
Latest FMF Resonance Chamber Technology (internal + external)
-
Patented core shape reduces sound while maintaining maximum power
-
Patented canister shape increases internal volume for better sound absorption
-
Patented chamber design refines exhaust pressure and improves flow
-
Factory Forward Engineering for mass centralization and reduced crash damage
-
Application-specific tuned exhaust core
-
Rear endcap accepts tuning inserts or spark arrestor
-
Includes Titanium Megabomb header for optimized power output
- Carbon fiber end cap
