I was wondering about the smell. I couldn't do it on my f30. Lasted a week. Tried again 2 years later, forgetting what it was like, lasted 3 days.

"It smells like a race track" were the comments from management. I also felt like I had a 3 star wanted level just putting around town.

I ended up learning some chemistry. Pretty cool how a piece of metal can change gas molecules.

High flow cat just to get the smell down should be great.

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'05 E53 3.0 6mt
'17 F30 340ix 6mt
'96 E36 328is, in progress