[lemonpinecone]

delete

[rbryantaz]

Originally Posted by lemonpinecone

Does anyone know how to do this without buying a tune?

I have the bimmergeeks standard tools and ISTA D

Thanks in advance

It shouldn't need any change.

It also has no significant power advantage and will make more drone. My 335i had it done by the PO and I wish they didn't do it... Removing primary cats helps power but the secodaries really don't. Plus it is good to have the secondaries if you ever remove the primaries to keep the smells down, etc