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FMF is the leader in high performance quiet technology and our Q4 is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don’t need to hear the power, just feel the power!

-Developed over years of championship off-road racing

-Max Sound output 96dB; most models below 93dB

-Constructed from aircraft grade aluminum and high strength stainless steel

-Use with FMF or Stock OEM Header

-Removable spark arrestor included

Notice: Closed Course Use Only
Item ID: 044232
Type: Slip-On
Configuration: Single
Const: Aluminum
Finish: Natural
Midpipe: Stainless Steel
Endcap: Stainless Steel
Spark Arrestor: Screen Insert (included)
Carb Warning: no
Quiet Insert: Included
Weight: 5.9 lbs.

Make Model Year Make Model Year
YAMAHA WR250F 07-13 YAMAHA WR450F 07-11
YAMAHA WR450F 07-11
YAMAHA YZ250F 06-09 YAMAHA YZ450F 06-09
YAMAHA YZ450F 06-09
    YAM YZ250F'06-09/YZ450F'06-09/WR250F'07-13/450F'07-11 ANODIZED S/S FACTORY 4.1 SLIP-ON MFLR   Item ID: 044235 - Factory4.1 SL (Slip-On)
    For: YAMAHA WR250F 2009


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