perez490

I have a stock mustang Gt the only thing it was is a BBK Cold Air Intake and I want to add a Throttle body plenum to it. I would like a second opinion.

SonicBlueFiveSlow

Wrong section, you belong in 4.6

Portmaster

You need a 5.0 swap. The throttle body plenum on the 4.6 non PI motor is a waste.

NoGo95GT

The 4.6 section is where you need to be. They can give you a better understanding of what works and what doesn't with the non-pi motors. However, a TB plenum is a worthless mod. I'd look into a lower rear gear swap or a PI upgrade. Unfortunatley, power does not come cheaply.