2016 4RUNNER SR5, OEM TRD PRO SUSPENSION WITH 3/8 TOPHAT SPACERS & 1" TOYTEC BAJA SPRING SEATS FOR A TOTAL OF 2.5" LIFT, 1.5" CORNFED SPACERS IN THE BACK, FX PRO WHEELS, 285/70/17 WILDPEAK AT3W, WEATHER PACKAGE, NAVIGATION, LED INTERIOR LIGHTS, AFE DROP IN FILTER WITH CARBON FILTER REMOVED, INTAKE RESTRICTOR REMOVED, & TRD AIR ACCELERATOR INSTALLED, TYGER SLIDER STEPS, TOYOTA BLACKOUT EMBLEM KIT, TRD PRO GRILL, POLY FRONT AND REAR SWAY BAR BUSHINGS, OEM 3RD GEN REAR SWAY BAR LINKS, REAR DIFF BREATHER MOD, RCI ALUMINUM FRONT SKID, OEM ALUMINUM OIL FILTER HOUSING UPGRADE, OIL CATCH CAN.
had no idea what it is for, thanks, but it does improve mileage, right?