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Tune rear damping for pavement, load, and rough terrain
Old Man Emu BP5160078 is a rear BP-51 shock for the current Toyota 4Runner, combining a large internal-bypass body with an external reservoir and independent rebound and compression adjustment.
Key Features
- Position- and velocity-sensitive internal bypass damping
- Exact Old Man Emu BP5160078 configuration
- Ten rebound adjustment levels
- Adjustable compression damping
- Remote reservoir for added oil capacity and temperature control
- 51 mm internal bore
- 6061-T6 aluminum body and reservoir
- Type III hard-anodized finish
- Three-year manufacturer warranty
Fitment
| Years | Make | Model or Trim | Verified Notes and Exclusions |
|---|---|---|---|
| 2025-2027 | Toyota | 4Runner | Rear; Limited, Platinum, SR5, Trailhunter, TRD Off-Road, TRD Off-Road Premium, TRD Pro, TRD Sport, and TRD Sport Premium |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | BP5160078 |
| Series | BP-51 |
| Position | Rear |
| Material | 6061 aluminum |
| Color | Grey |
| Finish | Type III hard anodized |
| Internal Bore | 51 mm (2 in) |
| Body Size | 2.8 in |
| Open Length | 26.1 in |
| Closed Length | 16.4 in |
| Rebound Adjustment | 10 levels |
| Reservoir | Remote |
| Warranty | Three years under ARB terms |
What's Included
- One rear Old Man Emu BP-51 shock absorber with remote reservoir
- Old Man Emu BP5160078 exact product shown in the retained images
- Only the exact mounting pieces shown with the product are included
- Coil springs, opposite-side components, installation labor, alignment, and unrelated suspension parts are not included
About Old Man Emu
Old Man Emu is ARB's suspension brand for vehicle-specific springs, shocks, struts, and complete systems. Components are tuned around vehicle configuration, load, ride height, and intended use, so the exact part number and current application data control selection.
Related Parts
- A matching rear shock for paired axle service when required by the suspension plan
- Old Man Emu rear springs selected for permanent load and ride-height target
- Vehicle-specific BP-51 front coilovers selected as left and right components
- Professional alignment and driver-assistance calibration when suspension geometry changes
FAQ
What is the BP5160078?It is an Old Man Emu BP-51 rear shock absorber for the verified current-generation Toyota 4Runner applications.
Which 4Runner years are supported?ARB lists the verified 2025-2027 applications shown in the Fitment table.
Which position does this shock fit?It installs at the rear of the vehicle.
Is the damping adjustable?Yes. ARB specifies adjustable compression damping and ten rebound adjustment levels.
What does the remote reservoir do?It increases oil capacity and helps control operating temperature during demanding use.
Is this a complete suspension kit?No. It is one rear shock absorber; springs and other matched components are selected separately.
Does installation require vehicle modification?ARB describes the BP-51 as a bolt-on design, but the current installation guide and vehicle service procedures still control the work.
What warranty applies?ARB lists a three-year warranty under its current terms and exclusions.
Installation Instructions
- Confirm the vehicle year and listed 4Runner trim, then verify the complete ARB suspension combination.
- Confirm the package label and manufacturer part number BP5160078 before installation.
- Record ride height and current adjuster settings before disassembly and support the vehicle at approved lifting points.
- Remove the existing rear shock according to the Toyota service procedure and the current ARB fitting guide.
- Install the shock and reservoir in the specified orientation without twisting or sharply bending the hose.
- Torque all fasteners at the specified suspension position and confirm hose, brake-line, sensor, tire, and body clearance through travel.
- Set compression and rebound only with the supplied adjuster and within ARB guidance for the vehicle load and use.
- Road-test at low speed, inspect for interference or leaks, and recheck mounting torque and clearances after the initial driving interval.
California Proposition 65 Warning: Cancer and reproductive harm. See www.P65Warnings.ca.gov.
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