(With Steeda sport springs in pic)
Here is my GT with the Borla Side Exhaust kit. It has a nice rumble to it and is fun to echo the exhaust when beside other cars. I also put on a bassani offroad x-pipe that made it a lot louder than with the stock h. It has a low rumble that isnt really loud at idle but gets loud at 2000rpm+. My brother has a borla cat-back kit also with a bassani offroad x-pipe and we both agree that mine is noticeably louder at idle and cruising speeds with a deeper/cackly sound. I have heard many people say to get different mufflers if you get the roush side exhaust with magnaflows because they are too quiet. I have also heard that spintech's side exhaust kit is louder than borla's but I have never heard the spintechs.
I have H&R SS springs and havent had any scraping issues yet. You will need to get exhuast cutout covers for your rear bumper or get a V6 bumper cover like i did. I also know that ford racing makes a rocker molding like roush to work with the borla side exhaust exhaust but i think it looks better without.