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  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
  • #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []
#Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 1
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#Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 6
#Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 7
#Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 1 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 2 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 3 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 4 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 5 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 6 #Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip [] - Image 7

#Powercore 4 YZ250/450F 06-09 WR250F 07-13/450F 07-11 Slip []

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Description

 

 

 

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 Natural Aluminum 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 especially to our standards.
  • Can be used with FMF or Stock OEM Header

 

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SKU: 189049
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