Description
If you want to unlock the full potential of your KTM 500 EXC-F (2020–2023), the FMF 4.1 RCT exhaust combined with the Vortex ECU is a highly effective upgrade path. It delivers dramatic, smooth performance improvements, noticeable responsiveness across the powerband, and a more exhilarating—but still ridable—ride.
VORTEX ECU
- Improved bottom end Power and throttle response
- Improved top end over Rev Power
- Power Ignition & Fuel Mapping developed for competition use with extensive dyno and track testing.
- Traction - Enduro maps for smoother throttle response and drive in technical conditions - Mud and Rocks
- Improved stall prevention
- Advances Fuel Injection Timing for improved atomization and response
- On the fly Map Selection via either KTM or VORTEX MAP SWITCH
- DTC (Dynamic Traction Control) Mode selectable via either KTM or VORTEX MAP SWITCH
- QS (Quick Shifter) Mode selectable via KTM MAP SWITCH
FMF 4.1 RCT MUFFLER
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
- Available in Blue Anodized Titanium Muffler with Carbon End Cap
- Massive Power gains throughout the RPM range.
- Huge weight savings
New RTS (Rapid Tuning System)
FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
Notice: Closed Course Use Only
Item ID: 045648
Type: Slip-On
Configuration: Single
Const: Titanium
Finish: Blue Anodized
Midpipe: Titanium
Endcap: Carbon
Spark Arrestor: Screen Insert (included)
Quiet Insert: 94dB Insert (included)
If you want to unlock the full potential of your KTM 500 EXC-F (2020–2023), the FMF 4.1 RCT exhaust combined with the Vortex ECU is a highly effective upgrade path. It delivers dramatic, smooth performance improvements, noticeable responsiveness across the powerband, and a more exhilarating—but still ridable—ride.
VORTEX ECU
- Improved bottom end Power and throttle response
- Improved top end over Rev Power
- Power Ignition & Fuel Mapping developed for competition use with extensive dyno and track testing.
- Traction - Enduro maps for smoother throttle response and drive in technical conditions - Mud and Rocks
- Improved stall prevention
- Advances Fuel Injection Timing for improved atomization and response
- On the fly Map Selection via either KTM or VORTEX MAP SWITCH
- DTC (Dynamic Traction Control) Mode selectable via either KTM or VORTEX MAP SWITCH
- QS (Quick Shifter) Mode selectable via KTM MAP SWITCH
FMF 4.1 RCT MUFFLER
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
- Available in Blue Anodized Titanium Muffler with Carbon End Cap
- Massive Power gains throughout the RPM range.
- Huge weight savings
New RTS (Rapid Tuning System)
FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
Notice: Closed Course Use Only
Item ID: 045648
Type: Slip-On
Configuration: Single
Const: Titanium
Finish: Blue Anodized
Midpipe: Titanium
Endcap: Carbon
Spark Arrestor: Screen Insert (included)
Quiet Insert: 94dB Insert (included)
- Brand: FMF