Sport Muffler 991 - 3.4 L "Brombacher" with Valves and Tips

• 11 Hp & + 10 Tq Gain.

• 2 3/4" Tubing (70mm).
• 4 x 3.5"(90mm) Round Tips.
• 38.5 lb. weight savings over OEM mufflers.
• German V2A - X5CrNi18-10 - 1.4301 stainless steel for improved durability.
• Absolutely NO DRONE in the cabin.
• Does NOT interfere with emissions and will NOT trigger the check engine light.
• ECU programming (software) is NOT NECESSARY.
• Replaces OEM side mufflers and connects to OEM header and catalytic flange.
• Under load (moving) with valves closed: 83dB*
• Under load (moving) with valves open: 89dB*

*OEM muffler is 75 dB with valves closed for reference.
Power is stated at the crank.

Please note: This muffler is a direct replacement the 991 Carrera S (3.4L - US model) which comes with valves. It is also a direct replacement for the Porsche Sport Exhaust option. For the base 991 Carrera’s (3.4L – US model) you will also need to order FVD Part # BES KLS 000 001 to compensate for the exhaust valves.

This is the very 1st aftermarket muffler for the 991 and is also one of the most technically advanced mufflers for Porsche to date. Our muffler incorporates an X pipe design to dampen and eliminate unwanted frequencies otherwise known as “drone” and gives the system the added benefit of increased torque in the mid-range. The actual muffler is vastly different than the common baffle plated muffles stuffed with packing material that are common in the aftermarket. Ours are uniquely made with double perforated sound absorption tubes. The acoustic silencer absorption tubes are made in a trapezoidal pattern and are perforated with varying diameters, which isolate and dampen unwanted frequencies. Perforated tubes at higher gas velocities, present much less flow restriction than baffle plates and consequently translates into larger horsepower gains at higher RPMs. Also they produce the aggressive gurgling sound and contribute to the low, deep tones that you hear with the exhaust valves open. The exhaust tips are a dual 3.5” round design and are double walled to dissipate heat, which means that they won’t tarnish as quickly as single walled tips. The design fit’s the factory cut outs in the bumper perfectly and is mounted via a ball style-connecting joint so they can be perfectly adjusted and centered.