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      05-28-2018, 02:02 PM   #23
Big Mexican Women
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Originally Posted by Taskmaster View Post
Yes, removing the secondaries has added as much as (8? 10?whp) but no, I would use a muffler in place of a muffler.
really? when I deleted the secondaries on my e90, I felt at the very most maybe 2-3HP gains. nothing major, but noticeable. the engine sounded good with them removed though.
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      05-29-2018, 08:20 AM   #24
Taskmaster
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really? when I deleted the secondaries on my e90, I felt at the very most maybe 2-3HP gains. nothing major, but noticeable. the engine sounded good with them removed though.
Yes, really. Were you running the stock muffler?
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      05-29-2018, 12:26 PM   #25
Big Mexican Women
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Yes, really. Were you running the stock muffler?
yup, I was running with secondary cat delete and stock muffler for some-time before switching the muffler to a Borla. Pretty happy with the setup for now.
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      05-29-2018, 02:23 PM   #26
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yup, I was running with secondary cat delete and stock muffler for some-time before switching the muffler to a Borla. Pretty happy with the setup for now.
That may have been why the gains weren't as large. The stock muffler is very restrictive (but quiet)
Post some clips - what Borla are you running?
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