I have been contemplating changing the exhuast on my 308. I just would like it to be louder, are there any "cheap" ways to obtain this ? (say $200-400) I would love to change out the muffler system but don't wanna spend the $1,200-1,800 to do so. I also thought about going with test pipes (or euro resonator) that's in my price range, but I like the idea of staying enviromentally and lawfully freindly ? Are there any other options ?