M5 CS exhaust

Nico_M5CS · 06-23-2023, 08:19 AM

Hi i have an european M5 CS so with GPF... The sound is....
I want to put a Milltek GPF delete with secondary cat delete.
I have seen that the Leib gpf module don't always work... What i must put not to have limp mode? I will not do a tune.
Thanks for your help.

Boosted_8 · 07-18-2023, 11:33 AM

There's three stages of resolution to opf delete. Once you have physically removed them you must have the Lieb pressure sensors to avoid limp mode. Second you can perform a opf registration via ISTA software to account for new range of pressures and hopefully avoid CEL. If all else fails you can run a OBD2 module that just clears the opf impossible pressure CEL every 60 seconds so it never shows on the dash.

06-23-2023, 08:19 AM	#1
Nico_M5CS Registered 12 Rep 2 Posts Drives: BMW M5 CS 2021 Join Date: Jun 2023 Location: FRANCE iTrader: (0)	M5 CS exhaust Hi i have an european M5 CS so with GPF... The sound is.... I want to put a Milltek GPF delete with secondary cat delete. I have seen that the Leib gpf module don't always work... What i must put not to have limp mode? I will not do a tune. Thanks for your help.
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07-18-2023, 11:33 AM	#2
Boosted_8 Captain 441 Rep 749 Posts Drives: M550i Join Date: Apr 2021 Location: UK iTrader: (0)	There's three stages of resolution to opf delete. Once you have physically removed them you must have the Lieb pressure sensors to avoid limp mode. Second you can perform a opf registration via ISTA software to account for new range of pressures and hopefully avoid CEL. If all else fails you can run a OBD2 module that just clears the opf impossible pressure CEL every 60 seconds so it never shows on the dash.
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