The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, it achieves a shorter overall length that is less susceptible to crash damage and complementary to FMF’s 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 FMF’s exacting specifications and is manufactured 100% at their Southern California factory.
- Made from anodized blue titanium with a carbon fiber end cap and a titanium mid-pipe and PowerBomb header
- Massive power gains throughout the RPM range
- Huge weight savings
- New RTS (Rapid Tuning System)
- Spark arrestor and 94dB quiet insert included
FMF PowerBomb Header:
- Titanium 4-stroke ATV header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header
- By positioning this “Bomb” at a key point in the system the flow increases nearly 10%
- The ducted core allows the exhaust gases to exit into the Bomb chamber, expand, cool and ramp back up at a higher velocity
- Acts as a ‘pre-muffler’ to lower the quad’s sound output by as much as 1.5dB through providing more sound absorbing surface area for the sound medium (exhaust gases)
- Proven PowerBomb patented technology provides increased performance of up to 10% horsepower gain
- Only available from FMF Racing, don’t be fooled by knock-offs
- The most copied header in the world
Note: For closed course competition use only. Not intended for street use.
Note: Image for reference only. Actual product may vary according to vehicle.
Note: This product may not be legal for sale or use in California or in other localities due to state and/or federal anti-tampering laws. Refer to chaparral-racing.com/terms before purchasing.









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