Okay so I go the TopSpeed Pro-1, and absolutely love it! Here is the video with catless test pipe and without.
Oh and the "launch" was at 2.5k because I didnt want to hit my camcorder with rocks, and the 1.6l N/A has no power, so it was kinda embarassing haha!
Its very loud, hangs low (not best for slammed cars I was stock ride height in video but since then I lowered it to like 2.75"-3" from pinch welds to ground (mod slammed) and I hit it sometimes but I live in PA and roads are horrible.