I assume you'd delete the DPF when mapping, so that shouldn't be an issue... I'm not sure on the exact model it is (" ti" rings a bell?!), but there's a specific model that I think looks epic since it comes already lowered on big wheels. According to the guy who mapped my 123d and has experience working with Alfas too... they are FAR better than previous generation Alfas. So I assume they're now just mildly unreliable?!
Cheers,
Grant