I bought an MBRP axle back for my car...basically because I wanted their slick looking double wall tips. I couldn't find much on it, just a couple so-so youtube videos and a couple vague testimonies from people that had owned it.
As it turns out...#1 I got it for $330 and it's all polished 304, #2 it sounds great (unmistakably mustang), and #3 it hardly drones at all. Actually, for me it drones more around ~2300-2400 rpm (75 mph) than it does dead on 2000 rpm. I usually cruise about 70, roughly 2100-2200 rpm, with no drone at all. Hoping it will stay that way when I put on an X pipe.