A GFB+ valve would be good with the revision G valve ( bit gfb+ fits into ) PM @t8ups and get some led Drl's ( he can code remotely if you have Vcd's or get hold off ) change the back lights ( look for the dark red lights 2011 model . Pair on Ebay £160 not mine ). Spruce up interior if non smoker change the Ashtray out for Ashtray delete and lighter for one with the flap . Upgrade your Head Unit and the list can go on but mind it will come at a cost and Santa has already been .
There is also some mileage in having the brass input fitting to the fuel pump drilled out to 5mm to maximise fuel flow. Again RTech as custom mappers can do this for you.
I don't know the technicalities but I think it helps the LPFP in some way, someone will confirm the details. I'm pretty sure R-Tech will do this for you if they are fitting your HPFP internals.