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my catalytic converter recently started rattling on my 04 n/a mini. and i was wondering if anyone here has tried using a high flow cat before? if it would lose power? be too loud? or even smell?
depending on the flow of the cat and the rest of your exhasut you will thow a CEL for the cat being below efficency, the fix is a O2 spacer for the rear oxygen sensor.
happend to me on my R53 its 2.5" all the way from the collector allt the way out and it didnt like it so i put a spacer in and it was happy.
Yea thats a good idea too. they are also both the same for R50 and R53 so dont limit your self to just looking at R50 sales.......... and probably the R52 but not sure