Crikey! that a lot of mods for 277bhp!
My old wagon made over 300 bhp and 240 lb/ft with- Complete de-cat, back box, walbro fuel pump, fse regulator,fcd, and manual boost controller running 17 psi. Not many mods but it worked, and to upset the nerds...I ran it on normal unleaded for 2 years aswell! only used super for crail/knockhill etc.
Col.