Running Catless OTS v10 while running stock DPs

twiztedE60

New Member
Nov 7, 2020
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Will this combination bring up any issues? Lately been finding my car runs smoother with the oscillation fix and id love to keep running it till an actual code comes up. Does this change much from the OEM dp selection other then im assuming target boost?

Im on updated turbos, index 12s, FBO minus the DP's (CA). 180k on the clock so I'm up to date on maintenance most of the time.

Recent maintenance due to mileage < last 5k includes:
New OEM ignition, stock plugs/dinan coils
Cleaned MAP
NTK vanos

Thanks!
 
Last edited:

carabuser

Captain
Vendor
Oct 2, 2019
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Z4 35i & 335i
The DP selection in MHD just disables the catalyst error codes and inhibits the diagnostic for the O2 sensors that causes the oscillating lambda.

There's no issues running OTS maps while stock downpipes are fitted, you just lose some power due to the exhaust restriction.