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-Quiet on the trail as well as on the sound meter
-Our most popular 2-stroke pipe
FMF is the leader in high performance quiet technology and our Q4 is the next evolution in off road exhaust
this pipe has what you’re looking for
Forest legal spark arrestor will meet the mandated 96dB sound level set by the US Forest Service making it the quietest 2-stroke performance spark arrestor made
STAINLESS STEEL ALUM. FACT-4.1 RCT W/R.CARBON CAP FULL SYSTEM 042372 YAMAHA-WR250F-2025 -Quiet on the trail asThe 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
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