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FMF Q4 S/A Silencer (NO CA)
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FMF Q4 S/A Silencer (NO CA)

Our price: $341.99

MSRP: $379.99 - You save up to $38.00 (10% off)

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    The FMF Q4 S/A silencer offers a low sound output, yet it still offers exceptional power gains. The Q4 silencer puts out 94db or less and also has a USFS approved spark arrestor with no screen to clean or screen to burn through. The FMF Q4 S/A silencer has more packing volume so you have longer time between repacking. So take the noise out of riding with the Q4 S/A silencer and not the fun.
  • Developed over years of championship off-road racing. Constructed with aircraft grade aluminum and high strength stainless steel.
  • Max sound output 96db, most models below 93db.
  • Comes standard with spark arrestor. Easily serviced for repacking.
  • Use with stock or FMF head pipe.

FMF Q4 S/A Silencer (NO CA) Reviews

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0 of 0 people found this review helpful.

lighter than stock but too loud

Comments On Feb 05, 2015:Decent build quality, lighter than stock. Does not use the Yamaha EXUP valve. I used this muffler in conjunction with a DynoJet fuel injection reprogrammer tuned professionally and it gave the bike better throttle response and more low to midrange power, or so I thought.
After much use commuting on surface streets and some race track laps, I found it too loud for street use, despite its Q label. While it can be acceptable droning at low RPM in a high gear, it is especially obnoxious accelerating.
Reverting to the stock exhaust did not change the throttle response or power delivery, which was improved by the EFI reprogramming, not by the loud muffler.
Basically this thing is a noise maker that shaves a few pounds.

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