Very Scary Noise.......
 

The other day I was drivin my FD around and got into it in 3rd gear, and when the transition hit at 4500 it was fine but when I hit about 5500 the car JOLTED and it was like the boost just shut off and it made the loudest exhaust noise Ive ever heard. Anyone have any ideas as to what It might be? The car seem to boost fine after that one time though. I am Currently runnin it at 12 on primary and 14 on secondary.

List of mods

PFS Intercooler
PFS Downpipe
PFS purple computer
PMS Keypad
Borla Midsection
No CAT.
Apexi Dual N1 Exhaust
Manual Boost Controler
PFS Boost Gauge