ARB 4X4 Accessories Air Locking Toyota 8in. IFS Differential, Front 30 (373-) Spline RD121 For Use With 30 Spline Axles;For Use With 3.73 And Down Gears;Air Activated Selectable Locker; Converts From Open Differential To fully Locked Or Spool; Simple Push Button Operation; Requires Air Compressor Sold Separately TOYOTA 4RUNNER FJ CRUISER LAND CRUISER TACOMA TUNDRA BASE LIMITED S-RUNNER SPORT SR5 TRAIL TRAIL TEAMS SPECIAL EDITION TRD SPECIAL EDITION 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2.4L 2RZFE (2438cc) 2.7L 2TRFE (2694cc) 2.7L 3RZFE (2694cc) 3.4L 5VZFE (3378cc) 4.7L 2UZFE (4663cc) 4.7L 2UZFE (4663cc) i-Force 4L 1GRFE (3956cc) 5.7L (345) 3URFE i-Force GAS ARB 4x4 Accessories ARB Toyota 8 Inch IFS Tacoma FJ Air Locking Differential - RD121 RD121 Differentials