Picked up a custom catless x-pipe from a fellow forum member recently. It has both primary and secondary cats removed, and a pair of magnaflow resonators. I tried to pair it with my OEM mod (perforated), but was way too loud and raspy as other forum members have warned. I'm used to loud exhausts, but it was unbearable to drive around with on the street. I swapped back to a stock muffler and it sounds much better, see some quick iphone videos below. It's a bit raspy compared to the oem mod, but has an exotic and aggressive tone to it. Definitely felt a nice gain in power throughout the power band as well.
