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FMF Q4 Hex Spark Arrestor Slip-On Exhaust With Side Panel
FMF Q4 Hex Spark Arrestor Slip-On Exhaust With Side Panel

$350.99 - $359.99
10% Off - Save up to $40.00
Rating: 5 out of 5 stars

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      Item #FMF0030

      1 Review

      5 out of 5 stars
      •   1 reviews
      •   0 reviews
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      All Reviews


      Over 4 years ago Colorado, USA
      5 out of 5 stars
      Ease of Installation
      FMF Q4

      I'm very pleased with the appearance, quality construction and fitment of this product. The power performance in exceptional. It has held up well for the past few years. Just wish it were even quieter since I fully agree with less sound more ground.

      4 Questions

      • Answered:   3
      • Not Yet:   0

      Question asked by blue benjamin

      Question: For a 2020 Honda crf450r, is this fmf Q4 Hex slip-on duel pipe or a single pipe? Also, is the 2020 crf450 engine the same engine as 2017 crf450 engine? Same stock pipe size?
      Question asked 6 days 20 hours ago

      Question asked by mike

      Question: Does this come with everything necessary to convert from dual exhaust?
      Question asked Over 10 months ago
      Question answered by Paul
      User's contributor status: Top 1
      Question answered Over 10 months ago
      Answer: In order to provide accurate answers, we will need to know the year, make, and model of your motorcycle or ATV.

      Question asked by luis

      Question: Will this muffler fit in a 2019 crf450x?
      Question asked 1 year ago
      Question answered by DaveGearhead
      User's contributor status: Top 10
      Question answered 1 year ago
      Answer: Yes it will fit your bike.

      Question asked by buddy

      Question: Any way to modify the end cap/ insert to reduce sound output 6 to 10 dB?
      Question asked Over 4 years ago
      Question answered by MotoSportExpert
      User's contributor status: Expert MotoSport Staff
      Question answered Over 4 years ago
      Answer: The FMF Q4 Hex Spark Arrestor Slip-On Exhaust has a 94 dB insert included. There is not an insert available to further lower the db level.


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      # Part Numbers

      Product Variant Manufacturer Part #
      FMF Q4 Hex Spark Arrestor Slip-On Exhaust With Side Panel 041506, 041558

      California Proposition 65

      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