crooked muffler

This is what I am putting together I only want to run 8psi...tell me if this is sufficient.

D16a6 compression tested 180 psi all 4 cylinders
-T25 w/ stock DSm o2 housing and stock water lines custum oil lines
-2.5" custum piping bak to a 2.5" in/ out no name muffler
-MSD 6 BTM racing ign. w/ 8.5mm SC wires
-stock DSM 450cc injectors
-stock 2nd gen BOV
-stock 2nd gen intercooler
-custum piping
-iridium plugs
-B&M FPR w gauge
-Walbro 255 hi flow fuel pump(in tank)
-K&N air filter
-custum turbo manifold probably from The Dropshop

anything I forgot.I have most of the parts but this is MY list.