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Old 09-19-2010, 09:09 PM   #249
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Join Date: Aug 2009
Location: St Louis, MO
Posts: 3,008
My Ride: 01 330x-xi
Originally Posted by PEI330Ci View Post
Guys, this has NOTHING to do with optimizing back-pressure. Too many have read "internet facts" without questioning the physics of what's really going on. This is about optimizing velocity in relation to pulse frequency.

The merge collector shape and LOCATION is where the power is made.
I've been saying this all along. IMO the Y pipe needs to be moved back. It's not going to be easy to find the right location. If you have a welder at your house. Who cares what it looks like start cutting/welding to find the proper placement. Best muffler is no muffler the best cat is no cat. It will always be this way imo. No reso's nothing pipe it from the headers back without any garbage in between. If performance is number one, sound shouldn't even be considered. Hope I made sense here
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