Thread: 435i performance parts. N55. Stock.
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      07-03-2018, 10:35 AM   #5
TunaRollz
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Drives: '13 MCB M5 | '15 MGM 435i 6MT
Join Date: Jul 2014
Location: Sunnyvale CA

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Quote:
Originally Posted by Busa1 View Post
How did the high flow cat work in the car? Did it ever cause a CEL?
It would after several hundred miles on my car. Until I installed the JB4 to disable it. Major gains in spool, torque and sound.
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