For those that are interested ..

"ESS does have performance software for the Z4M. It is $699 and includes about 11hp on the same gas, better response, better midrange, top speed limit removed, slight redline increase, and better startup and cold operation.

Optional choices include cat CEL delete (if a customer removes the cats it will disable the check light function but is still visible to an emissions station to be legal), sport mode button memory, and higher octane fuel modes."

Have you seen any any dynos?

Is it a reflash or do they need to monkey with your DME?

I have not seen dyno's

I believe it is a flash.

I don't much care about the supposed 11 horsepower increase, but the other stuff sounds good, especially the better midrange response and higher octane fuel modes. The sport button memory option is something people have been asking about since the first Z4s were released.

Im interested in this......how do i go about getting it?

Im interested in this......how do i go about getting it?

I am waiting for an answer on that. I will let you know soon as I get one.

If you live in AZ I could get you in touch with the right person ;)

Can this be re-flash back to factory when we bring our car to dealer for service or smog check in California?