The MotoSport.com FMF Factory 4.1 RCT Full Exhaust System includes ONE FMF Factory 4.1 RCT Slip-On Exhaust and ONE of your choice of FMF header model, each with the following features:
FMF Factory 4.1 RCT Slip-On Exhaust:
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. It starts at the center with a new core - a patent pending shape enhances and refines the exhaust pressure wave for optimal power output while lowering the sound level. In addition, it achieves a shorter overall length that is less susceptible to crash damage and complementary to the Factory Forward Engineering - moving the muffler(s) closer to the motor to centralize mass. Visible changes to the exterior include a redesigned canister to increase internal capacity for the maximum volume of packing material. The packing itself was not overlooked - a proprietary blend formulated for superior durability and sound attenuation. The final component is a new rear endcap engineered for simple tuning adjustments incorporating a snap ring feature to secure the standard and optional inserts.
- Massive POWER gains throughout the RPM range.
- Quieter than stock.
- Huge weight savings.
- Includes midpipe.
- Can be used with FMF header or stock.
- New RTS (Rapid Tuning System) makes for easy sound insert changes as well as adding U.S. Forestry Service Approved Spark Arrestor.
- #1 Exhaust in AMA Supercross Series, AMA Motocross Series, FIM Motocross of Nations and the Monster Energy Cup!
- Note: For bikes with dual exhaust systems, this combo only offers the single system conversion, so only ONE slip-on is included.
The Factory 4.1 RCT is constructed from only aerospace-grade materials that meet FMF's exacting specifications and 100% manufactured at their Southern California factory.
Your Choice of FMF Header Model:
FMF MegaBomb Header - Titanium or Stainless Steel:
The science behind the MegaBomb header may be FMF's greatest engineering accomplishment to date. You can bolt on a MegaBomb for as much as a 3 horsepower boost, plus the MegaBomb actually reduces noise levels by as much as 1.5dB. The FMF MegaBomb header is yet another testament to the continued dedication of FMF to developing the best performing motorcycle exhaust components. Used by Factory Teams, the MegaBomb is the next level technology you can have today.
- Produces long header torque and short header over-rev.
- The larger midsection creates a larger surface area for sound dissipation to reduce the sound output by as much as 1.5dB.
- Increases output from stock motor as much as 3 HP, alone.
- Constructed out of FMF's exclusive Ti-Metal for an extreme weight savings with added durability or from premium American stainless steel material (depending on selection).
- Designed with a unique midsection, comparable to the PowerBomb header, that provides improved power across the power range.
- The unique design of the MegaBomb header allows for better low end torque similar to a long header while also improving top end power much like a short header.
- Although the MegaBomb header offers the advantages of a long header, the design of the MegaBomb header reduces the length and the chances of getting in the way or suffering damage.
FMF PowerBomb Header - Stainless Steel:
The redesigned PowerBomb is a four-stroke 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, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. The result is a flow increase of nearly 10%! The outer chamber in the PowerBomb allows the air to expand, cool and ramp back up at a higher velocity.
Additionally, the PowerBomb is a "pre-muffler" of sorts which helps to lower the bike's sound output by providing more sound absorbing surface area for the sound medium (exhaust gases).
- Tuned for bottom to mid performance.
- PowerBomb headers are the front runner in performance headers.
- Designed for full service access to oil filter.
Note: For closed course competition use only. Not intended for street use.
