JLT Performance JLTABFMGPV-11 2011-2014 Mustang GT JLT Cold Air Box for Vortech Paxton S/C Blow Through JLTABFMGPV-11 JLT AIR BOX (2011-14 GT WITH VORTECH OR PAXTON SUPERCHARGER) BLOW THROUGH JLT Air Box consists of an roto-molded Heat Shield that ties into the stock fresh air inlet in the grille as well as seals to the hood, a 4.5 Flow tube, Huge 4.5X9 S&B Powerstack Air Filter, Silicone reducer and all clamps. The increased air flow resulted in an additional 1.5 PSI of boost and 20-30 RWHP and RWTQ increases through out the runs. This is with NO TUNING as its a blow through set up.