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Get rid of the resonators. That is the biggest restriction in the system. Save the y-pipe until after that. I gained 0.1 sec with the Banks (comes with new y-pipe). I got 0.15 sec gains by replacing the resonators with 3" pipes and race mufflers. The resonators are like 1.5" in inner diameter. Compared to the y-pipe, this is much smaller piping.
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1/4 - 13.74@98.2 1/8 - 8.79@80.2 (04 CC - it's gone now)
1/4 - 12.23@115.8 with the 06 Forester
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