Should I add a up and downpipe?

I already have a midpipe back setup with a Magnaflow exhaust and a UTEC. Considering adding an uppipe and downpipe for $200 from a friend of a friend who has trashed two WRX's already and now has an STI since he's a Daddy's boy. Lucky Bastard. Anyways, he wants to charge for labor to install the stuff and he initially said $600 installed. He also has a cold air intake which ended up trashing his last WRX since water got in it. Should I get the uppipe and downpipe with the cold air intake if the price is right? Thanks for your input.