down pipe?
 

ive been on ebay latley and seen divorced down pipes for 260 they have the wastegate pipe dump atmosphiricly would i lose hp on my stock 87 turbo?

i don't see it reducing hp.
i would fabricate a waste gate divider. or atm there is a guy selling his ddp with the wastegate divider for 240 + shipping. I would hurry tho (supra mania)

No it's not going to cost you power... I don't think it'll gain you anything measurable, but you'll probably see faster spool.