Borla here, too. On a 6 speed. Around 2,000 RPM it can get a bit of a drone, but a quick downshift or speeding up and up shifting takes care of the situation. The Borla has been on since November of 2004 and I believe that the tone has deepened a bit. I've got about 22,250 miles on the car. The Borla is indeed a classy package. No welding, modifying. Install and run.