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Learn MoreThe 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.
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.
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.
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).
Note: For closed course competition use only. Not intended for street use.
Product Variant | Manufacturer Part # |
---|---|
FMF Factory 4.1 RCT Full Exhaust System | 045592, 045582-CL77, 044459, 045514, 045581, 045605, 045640, 044458, 041082, 042179, 042274, 042094, 044298, 042337, 040073, 044033 |
SX Style | 042379, 045612 |
Stainless | 044439 |
Standard | 044422, 043310, 042344, 044450, 043369, 045621, 045625, 043309, 044421, 042338, 042343, 041577, 043368, 045620, 045622, 045624, 044449, 045604 |
Product Variant | Manufacturer Part # |
---|---|
Aluminum With Carbon Fiber End Cap | 045628 |
Aluminum With Stainless Steel Mid Pipe | 041517 |
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap | 042290, 042291, 043320, 044427, 042330, 045558, 045594, 043364, 044443, 042369, 044453, 045632 |
Blue Anodized Titanium With Carbon End Cap | 041587 |
Blue Anodized Titanium With Carbon Fiber End Cap | 045586 |
Blue Anodized Titanium With Titanium Mid Pipe | 044429 |
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap | 042259, 042286, 045561, 044400, 045570, 042371, 044455 |
Carbon Fiber | 043365, 044445 |
Stainless Steel With Carbon End Cap | 042374 |
Stainless Steel With Carbon Fiber Cap | 043372 |
Titanium Anodized With Carbon Fiber Cap | 042376, 043373, 045629, 045633 |
WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.