BMW 3-Series (E90 E92) Forum - View Single Post

Dann · 12-12-2018, 05:22 AM

N55 should be louder as it only has the primary cat but it does have a second "resonator" rather than a X pipe like the convertible has.

To make it louder, Replace resonator with X pipe and get the PE mod done to the back box.

12-12-2018, 05:22 AM	#2
Dann Major 133 Rep 1,381 Posts Drives: E90 LCi 335i Join Date: Feb 2015 Location: Portsmouth, United Kingdom iTrader: (0)	N55 should be louder as it only has the primary cat but it does have a second "resonator" rather than a X pipe like the convertible has. To make it louder, Replace resonator with X pipe and get the PE mod done to the back box. __________________ My Individual E90 LCI 335i
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