See my signature for all the mods. I currently running a hi-flow, however, all my emission crab has been ripped out, and emission is not a concern. Should I switch to a mid-pipe? I am running 14 psi, and how much louder would a mid-pipe compare to a hi-flow? Also, will I get uncontrolable boost creep? I do not have a boost controller @ the moment. Would a mid-pipe give me more hp w/ the same boost level? THanks

 

A midpipe will make more power at the same boost level.
It will be significantly louder than the hi-flow cat.
It will stink.
You may or may not get boost creep, and if you do, a boost controller isn't going to help. Only porting the wastegate or adding a restrictor plate in the exhaust will fix it.

 

What are you using for fuel management?
I have a similar setup:
Large StreetPort
3mm seals
Stock turbos w/clipped blades
supra pump
1300cc sec.
AEM ign.
FMIC
DP, MP, Apexi N1
PowerFC
AVC-R
K&N Intake
Pulleys
Seq. Simp. Silicon hoses
Other stuff im forgetting...
I run 14psi as well and see no boost creep or spikes as long as my intake temps stay above 30c.
With my setup, loud is an understatement, The RB duals I dont believe will be as loud.

 

I have a PFC. What is your number on the dyno? I make 350rwhp/ 282 tq