so far i have a aem air filter, mhg,arp head studs, 3 inch rsr GT 2 exhaust system from turbo back, whats the next few steps for performance? i know i need some 550 injectors and a lexus afm, anyone know where i can find some cheap but reliable ic hardpipes along with an intercooler, used or new,with prewelded BOV? thanks alot