I've been in email contact with the folks at Boxer Design/DS about tuning for our GTs and they confirmed yesterday that they can and will do tuning for our GTs, even though it's not listed on their website currently.
The cost is kind of high, but I'm curious enough that I'll probably try it after I get my Remus can and Evo intake kit installed.
They replied with this when I asked them about what base version of BMW CIP they use or install (if any) :
you should go to your BMW dealer and have the latest software installed. Then send us the ECU. DS Motorsport will only overwrite the fuel and ignition maps. If you upgrade the software after letting us flash the maps, then the BMW dealer will erase the fuel maps. The software from DS Motorsport will not upgrade your ECU to BMW's latest software version.
So obviously you want to be pretty happy with whatever software version you're currently running before doing this or you'll be hatin' life. They do offer an option that locks the ECU apparently so that BMW cannot overwrite anything, but you take your licks with that as you might imagine should you need or want to upgrade to a later version.
Here is their link if anyone is interested in giving it a go :
This is the fellow I've been speaking with if you'd like more info - nice lad and he's been very helpful about answering all of my questions : Alexander Kienle - [email protected]
I'll be sure to report back on how it feels, if anything is discernible. The genesis for this, for me, was playing around with various aftermarket solutions for the issues some of us have with high idle, throttle and so forth. Exhaust + intake + tuning might not result in a lot of extra power, but perhaps it will result in cooler temps (no more airbox warping excuse?) and smoother low speed transitions with a richer AF ratio. We'll see.