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      05-05-2019, 03:07 PM   #2
M235SDCA
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Drives: 16 M235 Vert
Join Date: Sep 2016
Location: San Diego

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Quote:
Originally Posted by vwcrusher View Post
Wondering if anyone has deactivated the baffle that closes off the left hand exhaust. I am told that it is a European inspired 'feature' to reduce noise pollution. It will only open up at higher engine revs. I am thinking that having it open all the time would improve engine breathing?

Thoughts?
I don't think you will see any performance difference. It is a pretty simple mod to disconnect the flap actuator if you want to try. If you really want to go crazy BMS and probably others make a CAN flap controller so you can open / close it manually.
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16 M235 Cabrio - BM3, ER CP, Wagner DP & IC, Dinan Intake, MPE, Torqbyte CM5
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