I'm trying to get into upgrading my '08 SS a little this year since i've gotten used to it (had it for a year this coming July and my car before it was a '93 Buick LeSabre ). With that being said i've looked online a lot and people are saying there's a major restriction in the Downpipe and there's a noticeable difference in your car after you get it upgraded. Which is the best way to go, catless or with cat? Also what are the benefits of the two? I want the most bang for my buck as well as the best throaty muscle-car esque sound I can get with a stock exhaust (I'm going to change them out later this year.) And where is the best place to get the downpipe from? Thanks in advance!