I have a weird sound coming from the back right side of the car, sounds like its right by the wheel. Only hear it at very low speeds (20-). Kind of a bump/scrape noise but its not rythmic like the tire or axel hitting something. No mods back there except catback exhaust but dont think its that. Any ideas would be great.

 

likely your brakes.. now that i read your post again.. maybe its not since you say its not rythmic.. maybe bad strut? since I cant hear it your outta luck

 

Whatever you find out, post it here for our benefit, dude! Good luck.