ARB 081805SP Seal Housing Kit for Air Locker RD111/RD121 Rebuild (Universal)

Vehicle Fitment

• Universal--fits all ARB Air Locker models RD111 and RD121

Fitment Notes

• Designed to rebuild the seal housing on RD111 and RD121 Air Lockers
• Compatible with all vehicle installations using these ARB lockers
• Not vehicle-specific--intended for drivetrain service, not direct bolt-on fitment

Features

• Replaces worn seal housing to restore airtight operation
• Includes OEM-grade O-rings for perfect sealing
• Manufactured from durable sealed plastic composite
• OEM-specified tolerances for correct seal compression
• Prevents air leakage and maintains locker responsiveness
• Prepares locker for rebuild or maintenance procedures
• Compatible with both new and refurbished Air Locker setups
• Easy-to-install--no special tools required

Specifications

• Part Number: 081805SP
• Compatible Locker Models: RD111, RD121
• Includes O-ring sizes: 111 mm and 121 mm seal surfaces
• Material: Sealed plastic housing + nitrile O-rings
• Weight: approx. 0.6 lb

Included Components

• 1x ARB seal housing kit (081805SP)
• O-ring set (111 mm & 121 mm seals)

Product Description

The ARB 081805SP Seal Housing Kit is a rebuild component for RD111 and RD121 Air Lockers, restoring optimal air seal performance. The kit includes precision-manufactured O-rings (111 mm and 121 mm), and a sealed plastic housing engineered to OEM specifications.

Designed for universal use across all RD111 and RD121 installations, this kit allows accurate restoration of locker seal integrity without full differential disassembly. Easy to install with basic tools and ideal for service or maintenance applications--keep your ARB locker operating reliably and airtight.