Wow, an immediate impact after installing the BBK 86mm Mass Air Meter!
I had previously installed the BBK 78mm Throttle Body along w/ a K&N 57 Series Air Intake kit.
I did previously see a noticeable performance gain - BUT after that install the 4.6L had noticeable hesitation & bog.
However, once I installed this BBK 86mm Mass Air Meter the engine immediately ran better without any bog nor hesitation!
Replacing the Mass Air Meter is must when installing an aftermarket throttle body!! View more reviews...