FMF Q4 Slip-On Exhaust Kawasaki KLX400SR 2003-2004 / Suzuki DRZ400 / S / SM 2000-2017
  • FMF Q4 Slip-On Exhaust Kawasaki KLX400SR 2003-2004 / Suzuki DRZ400 / S / SM 2000-2017 - Stainless Steel/Aluminum/Stainless Steel

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Video Reviews (2)

FMF Q4 Slip-On Exhaust Kawasaki KLX400SR 2003-2004 / Suzuki DRZ400 / S / SM 2000-2017 Videos

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

FMF Q4 Slip-On Exhaust Kawasaki KLX400SR / Suzuki DR-Z400 / DR-Z400S / DR-Z400SM

FMF is the leader in high performance, quiet exhaust technology and the Q4 Slip-On muffler is the perfect choice when looking to decrease sound levels without sacrificing horsepower. The Q4 exhaust employs intricate chambers, baffles and proprietary multi-stage packing material, making it one of the best performing quiet mufflers available. With the Q4, FMF has proven you don’t need to settle for a plugged up, horsepower-robbing muffler to keep noise levels down.


  • Developed over years of championship off-road racing
  • Max Sound output 96 dB; most models below 93 dB
  • Constructed from aircraft grade aluminum
  • Removable spark arrestor included
  • Can be used with stock or FMF Header
  • Weight: 5.7 lbs
  • 100% Made in the USA
4.8 / 5
Bang For The Buck
4 / 5
This Product Fits:
KLX400SR 2003, 2004
DR-Z400 2006, 2007
DR-Z400S 20002017
DR-Z400SM 20052017
Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel/Aluminum/Stainless Steel 1007879 043207 In Stock: Ships within 24 hours


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4.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang For The Buck
4.0 / 5
3.0 / 5
4.0 / 5
Ease Of Install
5.0 / 5
Fit & Finish
5.0 / 5
Bang For The Buck
4 / 5
3 / 5
4 / 5
Ease Of Install
5 / 5
Fit & Finish
5 / 5
Great sound, louder on the throttle, quieter at idle
Easy to install, no clearance or binding issues. It seems quieter at idle and louder when on the throttle when compared to the stock pipe but at the same time it's a far less annoying sound so definitely and improvement.
May 8, 2017
6 months ago
Bang For The Buck
4 / 5
Quality exhaust
This pipe got me the extra sound from stock that I was after without overdoing it. Admittedly a big quieter than I was expecting, but I appreciate that more than I thought I would. At cruise the sound levels are very near stock, but on throttle it lets out a nice bark. A deeper and throatier idle tone is a nice plus. No neighbor complaints yet either! The build quality is top notch, and the installation kit has all of the extra bits you might need for different set-ups like with or without the stock header pipe, solid clamps and extra hardware for use with spacers. The rubber cushion for the muffler clamp looks good and stays in place.
June 29, 2015
2008 Suzuki DR-Z400SM
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Browse 5 questions Browse 5 questions and 1 answer
Does this muffler fit the Australian DR-Z400E? They've been unchanged for years.
A shopper on Jul 3, 2016