ok i want to get a apex n1 for my ls teg 94 but after some searchin i was thinkin about going with a apex n1 muffler tip with custom muffler from the cat back. I was wondering if the cheapest way is the best way to go. I know apex probarly did some test and shit to make sure the muffler works right, but can i get the same results with a custom piping witht he same size etc