Ok, you spintech guys, I am sold. I just shot an email to spintech and have not heard back yet, but am all set up on this end to do a 2.25 dual custom exhaust with x-pipe and secondary cats removed. Now I am afraid the Super Pro's will be too loud or the Pro Streets won't be loud enough. So my question is: How much louder are the Super Pro's and are there any performance differences between them? Also, I noticed at Spintech's web site they point out that the Pro Streets are ideal for two cat systems. Will removing my Cats be a problem?