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FMF Factory 4.1 SL Slip-On Exhaust

Item: 327335

$382.49 – $449.99

Select Your Vehicle - Fitment Guaranteed

  • Out of Stock

FMF Factory 4.1 SL Slip-On Exhaust

FMF's Factory 4.1 SL slip-on muffler is guaranteed to produce more horsepower throughout the entire RPM range when compared to the stock muffler. Each Factory 4.1 SL muffler is constructed from only aerospace grade materials that meet the California company's exacting specifications.

  • Massive power gains throughout the RPM range
  • Significant weight savings when compared to the stock muffler
  • Fabricated using the highest quality alloy grade materials
  • Fits OEM or FMF headers
  • Comes with all required mounting hardware and easy-to-follow installation instructions
  • FMF 94 dB quiet insert available (sold separately)
  • Made in the USA
Specification Details
Color Varies (make selection above)
Configuration Single Muffler
Country of Origin USA
Finish Varies (make selection above)
Mid-Pipe Varies (make selection above)
Muffler End Cap Stainless Steel
Muffler Sleeve Titanium
USFS Approved Spark Arrestor Varies (make selection above)

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

  • CRF150R 2007-2009, 2013-2021
  • Raptor 700 2013-2023
  • Raptor 700R 2006-2023
  • WR250F 2007-2013
  • WR450F 2007-2011
  • YFZ450 ATV 2004-2009, 2012-2013
  • YZ250F 4-Stroke 2006-2010
  • YZ450F 2006-2009

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