Quote:
Originally Posted by drunkenup
there was another thread saying an x-pipe will tone down the high-rpm rasp
example is a (probably) fully catless 335i, with performance exhaust, downpipes and most importantly, x-pipe.
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Thanks buddy. I know there are not a whole lot of 335is to start with and even less modded. So looking for some 335is owners and what they did after down pipes if it bothered them. I want to know if going catted will really help. That is my next step.
Thanks for the reply and source.