Quote:
Originally Posted by Kosmic
Sorry for my bad english.....i hope you can understand.
I installed 200 cell metal catalytic converters from F90 M5 with the M5 sport exhaust system because of Stage 2 tuning.
However, the system is very loud in its configuration. Therefore, I removed the preheating of the catalytic converters to reduce further problems with the neighbors.
Now we have 79db/a by 3500U/min.
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Did you also put in the s63 manifolds?