Quote:
Originally Posted by Dackelone
I think I found a pic(s) of the factory 1M mid pipe resonator cut open. Like my German buddy told me... he sold his OE 1M mid pipe to a guy wanting a louder exhaust... so he cut open the resonator and was going to make a "straight pipe". But to his surprise... THAT is exactly what BMW had already done! So now we know why the stock exhaust drones a little bit!
Here are the pics I found on the web...
Attachment 804646
Attachment 804647
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I wish we could find out who took these photos. If you look closely at the pipe in the smaller chamber, it looks like a hack weld job of a band covering where perforated holes may have existed, as seen in photos of unmodified 135i resonators. Are we certain this is a stock unmodified resonator? In the days of cutting costs, it seems odd that BMW would go through the extra work and expense of making a dummy resonator, especially when they offer an performance exhaust system for the 135i that has a y pipe in place of the resonator.