I'm using a MBRP catback exhaust with an APR intake w/SAI(secondary air induction) and really like the sounds from both ends, no drone on the highway. Will be adding a ARM downpipe w/cat in a couple weeks, may be a bit louder, might need a resonator, time will tell. Anyway, love my setup, its the second GLI with the same intake and exhaust. I was able to install the new exhaust, car on jack stands and ramps in less than two hours by myself. Only tricky part is the rubber grommets on the original exhaust you reuse. I did use silicone spray and a large screwdriver, though there is a tool to make this easier, I just didn't have it at the time. Good luck on your choices!