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Join Date: Sep 2004
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the y-pipe is kinda shitty...Much better designs out now. The newer tsp y-pipe design is a true merge, and has much better flow. I had some hooker 1 3/4's, with their y-pipe back in 04. I changed to ARH 1 7/8 and their y-pipe, and with no other changes, I gained 30rwhp. Most of that was from the bigger primaries, but the merge on the y-pipe contributed to the results as well.