What should i do to my Mk3 3lt Turbo Supra 1st?? . i just got a HKS type 0 and im buying a new b.o.v and intercoola soon , what else would i need to b able to beat stock standard 180's rx7's wrx's etc..

I thought I already told you what you should do first, intake, exhaust (elbow, DP, and 3" all the way back) up the boost a few psi with a BC. If you don't want to buy a BC you can put 3 or 4 washers in the WG to space it out. If you want more than that do the lex/550 upgrade, after that you could upgrade the ct-26 with a 57 or 60-1 trim wheel or buy the SP61gt which is a bolt on SP turbo. You could also just upgrade to a t04, sp turbo, or hundreds of others then use a new turbular manifold, then swap out the 550's for bigger injectors, get a SAFC and a AVCR or another nice BC and FC. Actually just read this FAQ from SF...
http://www.supraforums.com/forum/showthread.php?threadid=152334

As projectsupramk3 said... start with the exhaust, air filter and after that boost-, fuelmanagement stystem, lexus AFM/550 inj, bigger BOV, bigger fuelpump, Checkout supraforums.com.