Originally Posted by sverma
There's a thread on the 1M engine subforum that I'll dig up from a guy who went from piggyback to COBB (beta tunes) to evolve tune. It's rare that one person tries multiple tunes, so a true independent comparo is hard to find.
Refreshingly, it wasn't a shameless vendor plug but a pretty balanced review I thought.
I'll post a link here once I find it.
Have read that thread previously, but he never actually installed the Cobb on the 1M, only on his 335i..