The only difference I know of it the DP is a larger bore on the ST, I wonder if that has anything to do with it? Is the fuel system the same?

i haven’t even cleaned the MAF or MAP on it yet and I’ve noticed some odd boosting behaviour where sometimes it seems to lack a little so I’ll probably have a look at the boost solenoid as I’ve heard that’s a common failure item, I’ve also noted a slight jerkiness at low rpm when coming back onto the power so maybe a throttle body clean would be an idea, but I’ll just keep doing bits as and when, it drives fine overall though.