MAF Mass Air Flow Sensor Bung LS Billet Boss Mount Weld Flange LSX LS3 LS7 GM LS3 / LS7 / Gen V LT / VW Radius cut on bottom accepts 4" Pipe Billet Aluminum Included: Weld Bung, (2) Bolts Fits LS3, LS7, VW, and all GM LT series engine 2014-Up