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      11-03-2012, 11:42 PM   #19
keeedle
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Drives: 2008 E90
Join Date: Apr 2012
Location: Rochester, NY

Posts: 263
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2008 BMW E90  [4.38]
Quote:
Originally Posted by N0OS3 View Post
I will take a pic next time i go into the shop to discuss. I should have done that to begin with actually.


They synopsis is this: From the OEM headers(x2), it is a 2-1/4" pipe. This feeds into your secondary catalytic converters, back to 2-1/4" pipe (x2). These two pipes feed into your resonator. The resonator is a single-out 3-1/2" molded pipe. This feeds to your muffler. The muffler then outputs (x2) 2-1/4" pipes [stock]... and if they came with fancy tips, they basically just slide onto your piping and welded.

My suggestion is that if you want LOUDER, go with just sticking a y-pipe onto the molded 3-1/2" pipe and out to make your quads. If you want quieter, then go with the muffler of your choice that has 3-1/2" in, to (x2) 2-1/4" (or 2-1/2") out to make quads.
Thanks for the info.
I don't want my car to be too loud. I want it to be louder than stock but doesn't want it to sounds like a civic..
Do you have any muffler in mind that sounds good? I saw a lot of members using magnaflow universal mufflers to make their duals/quads. Any comment on those?
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