First, if anyone can give me the web address to Billy Goat exhaust I would appreciate it. Google doesn't seem to help. Now, for my 88 GT , I am stuck between B&B Bullets, SLP Loudmouth, or Magnapacks. Which system do you think sounds best? I know it is personal opinion, but I want something LOUD and which sounds good. I am building a 331 with future plans for a turbo. I would go custom if needed with 3" pipes. Any feedback or soundclips would be greatly appreciated. Thanks!