Ok so here is another question... I am probably going to go w/ the test pipes... now.. Is it possible to attach an X pipe to the stock exhaust? if so does anyone sell one.... and how much of a difference in gain would there be between just replacing the stock y pipe with an xpipe and getting a whole new exhaust? I have heard that the vast majority of the restriction in our exhaust is between the y pipe and the cats.. not necessarily the rest of the exhaust i.e. the muffler
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