is there any power difference between the two? im planning on goin duals off the muffler just for the noise in the cab part of it,wonderin if there would be any difference.also i have a cb extreme dumped now and is there much sound difference with the dual pipes?

Well I just dumped my exhaust after the muffler and befor the axle. Its louder in and out of the cab.

sound and price should be the only difference

I am sure there are some very very small advatages to dumping it vs out the back. Just due to the constriction of the pipe but again i am sure it is minamal.