Hey ams, it's really not THAT bad. I am actually getting ready to put my OBX and Racing Beat BACK on the car after I took it off a couple months ago. Really, the only place mine bothered me was on the highway. At 75 mph you're riding over 3000 rpms. It has some drone right in the range of about 3000 to 3600 or so. Once you get past the 3600 rpm point it actually quiets right down. Everyday driving around town it sounds quite nice. I thought really hard about selling both my header and the RB. I decided to keep em for a while and now i am getting ready to put em back on......
Hey, do you have any problems with your exhaust hitting the underside of the car just above the rear axle ? I have to change from the stock motor mount in the front on mine to keep it from rattling like a b#!%h.