05-11 Ported Crown Vic Upper Plenum with Ported 70mm Throttle Body ported using a super spiral carbide burr and finished in 100 grit followed by a light crossbuff all casting defects and sharp edges and reshape the radius for improved airflow, meaning noticeable horsepower gains especially at upper RPMs This plenum unlike aftermarket plenums like the SR and accufab requires no modifications to vacuum connections/routing No tuning needed, install and enjoy, true bolt on mod for your Drive by wire crown Vic, especially since this combo is paired with a larger 70mm TB
