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      12-06-2012, 12:26 PM   #19
GTM_Challenge
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Drives: E92 M3,X5M,F30 335
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Quote:
Originally Posted by tdizzle View Post
Tune required?

I'm wondering how this would affect the PPK (assuming we can ever get it)
We have not seen any CEL for the HFC version on the current ECU version for the F30s. We tested this for about 3k miles. The catless downpipe will through a CEL and will require a tune or flash to correct.