FMF Racing Suzuki DRZ400 06-07/400S 00-22/400SM 05-21 / Kawasaki KLX400SR 03-04 Q4 S/A Muffler

If you're looking to get more out of your Suzuki DR-Z400S, DR-Z400SM, or Kawasaki KLX400SR, this FMF Racing Q4 S/A muffler is a solid option. It's designed to improve your bike's exhaust flow and reduce noise, making for a better riding experience. This muffler is built to fit specific models, ensuring a straightforward installation when you're ready to upgrade your exhaust system.

The key to this muffler's performance is FMF's patented Power Bomb module. Positioned early in the header system, this module helps manage exhaust sonics. It works by allowing exhaust gases to expand and cool within an extra chamber before exiting through the perforated core and sound-absorbing packing. This process not only increases exhaust flow by nearly 10% but also acts as a pre-muffler, effectively lowering the bike's overall sound output. You get a noticeable improvement in performance without an excessive increase in noise.

This muffler is a well-built component designed for riders who want a balance of improved performance and manageable sound. It's a popular choice for those looking to enhance their off-road or dual-sport machine.