Hi Gill, sparkn is correct. Think of it this way, you've opened up the exhaust with the cobra system and fuel processor, but not the airflow. Unfortunately the 950's are very lean from the factory due to EPA regulations. You don't have to spend a fortune on an air intake system either. As the finishing touch on my 09' 950t, the open air intake allowed the motor to breathe. I'd suspect it's starving for more air since you've opened up the exhaust. As sparkn eluded to, the stock air intake is probably flattening your powerband. Keep us updated once it clears up for you.