with a remap am running 358 bhp 300 at the wheels at the moment,I would suggest you talk to http://www.adgespeed.co.uk
I have 08 he's going to do my sharkeye am looking on takeing mine upto 500 + ,I have upgraded bushes all round, swaybars front and rear,ats suspension,cossie pistons,miltek full system japspeed fmic, PERRIN EBCS Pro Boost Control Solenoid , 18 "wheels speedline , at the moment handles like it's on rails,am looking at changeing ecu,studbolts,injectors,conrods,remap bigger turbo looking at 5000 to 6000,7000 pound or there abouts topbloke if you tell him brad put you onto him he will help you out