JGY why customs are a good company, i bought some head studs from them the delievery was fast and prompt.why upgrade your turbo to a T3 flange, that is going to cost alot more money than you have to spend. A CA comes with a T25 flange. You could either go with a turbo such as a GT25R or a GT2530, or even a disco Potatoe which will get you to your horsepower goals without spending access money on an Exhaust maniold, an external wastege, a dump tuble, and a new downpipe.
http://store.yahoo.com/cheapturbo/gagtdpo.htmlSomething of that nature. You will save atleast a $1000 keeping with a t25 flange and you will get to your Hp. goal