Motorsport Elise - new engine?

I noticed on the new lotus motorsport site, they state the the motorsport elise now has an “evo II” engine - whatever that means? Still chucks out the same 200bhp though.

I believe there are even two engine specs fitted to the exige, changed when aircon was added, this might be the reason why there is an evo II version of the K series. Not that I am suggesting the Motorsport Elise has aircon [image][/image]