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      10-08-2021, 06:44 AM   #144
kjdeion21
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Drives: BMW F10 M5
Join Date: Jun 2021
Location: Houston, TX

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2023 BMW X3M40i  [0.00]
2013 BMW M5  [0.00]
Quote:
Originally Posted by M5Rick View Post
Drawing more gas with c/l/d/pipes so cutting out. Put the cats back on it makes no difference to hp.
Okay that is an interesting take... so you suggest reverting back to the cats? It has given me a substantial HP gain though, I should have picked up between 50-55hp, per the forums and the other owner experiences so you are saying the air to fuel ratios may be giving it the issue, correct? Do you think when I install the tune it may take care of the issue if I tune it accordingly?
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