Hey guys, I'm looking at getting a custom exhaust system for my truck this weekend. I've been looking at the posts about exhaust systems and what everyone likes, but most of the posts are for V8's. I've got a four, hence a desire for more power and sound. What muffler should I look at? It will be a single entry and exit, from just behind the cat to the front of the rear tire. What should this cost, minus the muffler? Thanks for any help you guys can give me.