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      09-27-2011, 07:45 AM   #5
M1one1M
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Drives: nothing
Join Date: Jun 2011
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Catless downpipes will net you the most power out of any modification you can do to your car other than a tune. In all honesty the rest of the system is more for show, because the standard 1M system is extremely efficient as it is (except for the downpipes).

But as I mentioned above, there is a trade off if you decide to go with catless downpipes, and that is the need for a tune and the eventual discovery that you are running catless downpipes by your dealer if you don't tell them.