1QUICK85 said:If you still running a stock cat....it may be plugged up. Do you have any exhaust leaks? Check headers for cracks. Do you have the stock Y connector on right?(Goes between the turbo and wastegate/solenoid) Check one of the link in my sig for a pic of the Y connector if you don't know what I am talking about. This one:
http://www.gnttype.org/maint/quickref.html
HTH, Nick.