The ARB RD121 Air Locker is a selectable locker for Toyota 8" IFS front differentials with 30-spline axles and gear ratios of 3.73 and numerically lower. It provides on-demand traction without compromising road manners or driveline longevity.

• Provides 100 percent traction on demand without affecting on-road drivability or driveline wear
• Easy, convenient operation allows the user to concentrate on the terrain without leaving the comfort and safety of the driver's seat
• Two-piece design is ultra-durable and extremely strong ? minimal moving parts ensure maximum reliability
• Patented ?timed' locking mechanism offers high strength and ultra-fast unlocking
• Steel reinforced, elastomer bonded annular seal designed to handle the most extreme climatic temperatures on Earth
• Kit includes: Air Locker differential, activation switch, solenoid valve, air line and bulkhead fitting
• Air compressor required for operation (sold separately)