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    • Walker® Quiet-Flow™ Muffler
      (14 reviews)
      # sp4412
      Quiet-Flow Muffler by Walker®. Together with delivering OE-style sound, the Quiet-Flow Muffler features 100% steel construction for maximum durability. This part is a perfect choice if you are looking for proper OE-quality...
      $28.76 - $699.89
    • Bosal® Muffler
      (17 reviews)
      # sp4612
      Muffler by Bosal®. Bosal works closely with OEM's across the globe to develop customer tailored solutions. With a focus on every aspect of the customer's needs, from product design to location of manufacture, Bosal's worldwide...
      $23.82 - $341.02
    • Walker® SoundFX™ Universal Fit Muffler
      (5 reviews)
      # sp4418
      SoundFX Universal Muffler Fit by Walker®. This muffler is the right choice if you opt for quality acoustics and performance. Walker offers 100% aluminized steel SoundFX Mufflers with direct fit and universal fit options available,...
      $30.31 - $32.20
    • Walker® Resonator
      (16 reviews)
      # sp4420
      Resonator by Walker®. If you want exhaust piping that delivers precise OE-style fit, appearance, and reliability, this part is your number one choice. Every pipe is vehicle-specific and is manufactured using precision benders to...
      $25.23 - $328.13
    • STARLA® Muffler
      (1 reviews)
      # sp1727
      Muffler by Starla®. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal reasons, but before you waste your time and gas rushing out to...
      $2.09 - $377.06
    • Walker® SoundFX™ Direct Fit Muffler
      (13 reviews)
      # sp4416
      SoundFX™ Direct Fit Muffler by Walker®. This muffler is the right choice if you opt for quality acoustics and performance. Walker offers 100% aluminized steel SoundFX Mufflers with direct fit and universal fit options available,...
      $27.51 - $121.19
    • Bosal® Exhaust Clamp
      (0 reviews)
      # sp4630
      Exhaust Clamp by Bosal®. Bosal works closely with OEM's across the globe to develop customer tailored solutions. With a focus on every aspect of the customer's needs, from product design to location of manufacture, Bosal's...
      $0.38 - $23.22
    • Flowmaster® Super 50 Series Delta Flow™ (SUV) 409 Stainless Steel Muffler (3" Center Inlet / 2.5" Dual Outlet) (8530552)
      (41 reviews)
      # mpn910818
      Universal Super 50 Series Delta Flow™ (SUV) 409 Stainless Steel Muffler (8530552) by Flowmaster®. MILD SOUND. 3" Center Inlet / 2.5" Dual Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The 2-chamber design...
      The Original High Performance Flowmaster MufflerrAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $147.26
    • Flowmaster® Super 50 Series Delta Flow™ (SUV) Aluminized Steel Muffler (2.25" Dual Inlet / 2.25" Dual Outlet) (524554)
      (41 reviews)
      # mpn910803
      Universal Super 50 Series Delta Flow™ (SUV) Aluminized Steel Muffler (524554) by Flowmaster®. MILD SOUND. 2.25" Dual Inlet / 2.25" Dual Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The 2-chamber design of...
      The Original High Performance Flowmaster MufflerrAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $140.48
    • Flowmaster® 40 Series Delta Force™ Aluminized Steel Muffler (2.25" Offset Inlet / 2.25" Offset Outlet) (42443)
      (41 reviews)
      # mpn854005
      Universal 40 Series Delta Force™ Aluminized Steel Muffler (42443) by Flowmaster®. AGGRESSIVE SOUND. 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the muffler that...
      The Original High Performance Flowmaster MufflerrAggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
      $83.76
    • Flowmaster® Super 44 Series Delta Flow™ 409 Stainless Steel Muffler (2.25" Offset Inlet / 2.25" Center Outlet) (842446)
      (41 reviews)
      # mpn864527
      Universal Super 44 Series Delta Flow™ 409 Stainless Steel Muffler (842446) by Flowmaster®. AGGRESSIVE SOUND. 2.25" Offset Inlet / 2.25" Center Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The Super 44 has...
      Deep, Aggressive, High Performance Exhaust NoteTwo-Chamber Design for Power and Torque Increase
      $97.26
    • Flowmaster® Super 44 Series Delta Flow™ Aluminized Steel Muffler (2.25" Offset Inlet / 2.25" Center Outlet) (942446)
      (41 reviews)
      # mpn875637
      Universal Super 44 Series Delta Flow™ Aluminized Steel Muffler (942446) by Flowmaster®. AGGRESSIVE SOUND. 2.25" Offset Inlet / 2.25" Center Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. The Super 44 has...
      Deep, Aggressive, High Performance Exhaust NoteTwo-Chamber Design for Power and Torque Increase
      $86.41
    • Flowmaster® 50 Series Delta Flow™ 409 Stainless Steel Muffler (2.25" Offset Inlet / 2.25" Offset Outlet) (842453)
      (41 reviews)
      # mpn854031
      Universal 50 Series Delta Flow™ 409 Stainless Steel Muffler (842453) by Flowmaster®. MODERATE SOUND. 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 17" Case Length x 23" Overall Length. The 50 Series Delta Flow...
      Three Chamber Delta Flow TechnologyFully MIG-Welded for Maximum Durability
      $124.27
    • Flowmaster® 40 Series Delta Flow™ Aluminized Steel Muffler (2" Offset Inlet / 2" Center Outlet) (942041)
      (41 reviews)
      # mpn854033
      Universal 40 Series Delta Flow™ Aluminized Steel Muffler (942041) by Flowmaster®. AGGRESSIVE SOUND. 2" Offset Inlet / 2" Center Outlet, 5" Thick x 10" Wide x 13.50" Case Length x 19.50" Overall Length. The Super 40 Series Delta...
      The Quietest Option in the 40 Series Two Chamber LineLess Resonance than other 40 Series Mufflers
      $97.26
    • Flowmaster® 50 Series Delta Flow™ Aluminized Steel Muffler (2" Offset Inlet / 2" Center Outlet) (942051)
      (41 reviews)
      # mpn854036
      Universal 50 Series Delta Flow™ Aluminized Steel Muffler (942051) by Flowmaster®. MODERATE SOUND. 2" Offset Inlet / 2" Center Outlet, 4" Thick x 9.75" Wide x 17" Case Length x 23" Overall Length. The 50 Series Delta Flow mufflers...
      Three Chamber Delta Flow TechnologyFully MIG-Welded for Maximum Durability
      $110.21




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    The BMW muffler consists of metal plates and tubes with multiple holes in them. Between the tubes, there are chambers that cancel out the unwanted frequencies and suppress the annoying noise. Once the sound waves and exhaust gases move into the muffler through the center tube, they bounce off the back wall of the unit and then come back out into the main body. That creates waves that have the opposite amplitude, which makes them cancel each other out.

    The chamber where the process of wave collision occurs is called the resonator. Its size is precisely calculated so that the process runs smoothly. The principle that the device works on is pretty simple. When the high-pressure sound wave that is coming out from the first chamber meets the reflected low-pressure wave, they cancel each other out because the two waves add up to zero. That's the way the muffler reduces that tremendous amount of noise produced by the engine.

    Another important characteristic of the muffler is that its body is constructed in three layers: two thin metal layers with a thicker insulated layer between them. Such a structure allows the unit to absorb some of the pressure pulses. The muffler itself is manufactured from sturdy materials such as stainless steel and aluminum-coated steel. That ensures the part to function for a long period of time. And the better your muffler operates, the greater performance your vehicle offers.

    BMW Mufflers & Resonators Reviews

    Average rating:  5  5 - 1 reviews
    4.8 of 5
    Good Fit
    Perfect fit. The main reason I decided to change my stock muffler because it had completely rusted. The product that I had received from CARiD was fully the same as advertised. And the sound was also not so annoying as it could be from the muffler, a little mess was made by me in the garage but it was bearable, though the work had been done without titanic effort.
    EPosted by Edward (Streetsboro, OH) /
    1999 BMW Z3
    Was this review helpful for you? Yes
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