I currently own a 2009 honda civic coupe DX and I was wondering if there was any exhausts out there that sound REALLY nice. Price range won't matter for me, I'm just looking for something that will have a moderate sound level with a deep aggressive tone.

Also, on a side note I was wondering if anybody knew what kind of problems my honda might have. Every time I go over a speed bump going at 15 KM/h or more my car makes a really loud thump as if I was going too fast. I've gone 15 KM/h on my toyota corolla and it doesn't make a loud thump. I've heard the solution to this was to get the suspensions fixed.

Another problem, whenever I turn on my car it has a lot of vibration to it, when I switch to park, reverse, neutral it vibrates alot, when I go into D it vibrates less. And when I'm driving if I'm coasting (taking my foot off the gas pedal) then the car will vibrate alot again. I've heard this could be a transmission or engine mount problem.

If anybody could help I would be greatly appreciated.