Review on 🔊 Borla 40357 Muffler: Unrivaled Performance and Sound Enhancement by Doug Powell

I mounted this exhaust on my BMW 320i and I love it. It has a deep tone at idle and is almost inaudible at cruising speed. Gives the 3 Series a sporty sound without the hassle of an OEM sport exhaust. I had my local muffler shop make an extra pipe and weld it in place for a fraction of the cost.