Emerald is about to launch the K6 ecu, with a host of improvements, two of which can also be put onto the previous K3 version, they are TRACTION CONTROL and LAUNCH CONTROL.
NB the new K6 uses the K3 software up until release date proper when a simple download from emerald is needed to update the lot, this will be at the same time as the K3 LC and TC are launched.
The new K6 uses totally different software, connectors and has many more features than the K3, personally I'd be well happy with LC on a 2wd cos!!
I cannot give any further info on the K6, but there is a small amount of info on the site www.emeraldm3d.com
tabetha