What can I do to 2l petrol

Hi I have recently brought a c30 2l petrol r design 2011 just wondering what I can do to it.
Does anyone make a mesh grill for the facelift model?
I'd like a bit more acceleration any ideas or has anyone done anything to a 2l c30?
I'm going to have the roof wrapped in gloss black
Not looking for huge mods exterior wise don't mind small changes.

There'll not be much you can do to pull more ponies from a N/A car without spending ££££'s on things like headers, high compression pistons etc.