Make: KTM
Model: 250 XC-F
Year: 2011
Can Type: Factory 4.1 RCT SL
Can Finish: Aluminum/Natural
End Cap: Stainless Steel
Midpipe Construction: Stainless Steel
Header Construction: Titanium

Description:

Powerbomb Header: FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE. 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. 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 bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range. Factory 4.1 RCT SL Muffler: 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, 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. 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 our exacting specifications and is manufactured 100% at our Southern California factory. - Available in Natural with Stainless Cap or Natural with Carbon Cap - Massive Power gains throughout the RPM range. - Quieter than stock - Huge weight savings - New RTS (Rapid Tuning System) makes for easy sound insert changes as well as adding US Forestry Approved Spark Arrestor. - Can be used with FMF header or stock. - #1 Exhaust in 2011 Supercross Series, 2011 Motocross Series, 2011 Motocross of Nations and 2011 Monster Energy Cup!

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