Blackhawk Prado FJ Adjustable Upper Control Arms | BHU3841P

BHU3841P

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$1,281.50
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Blackhawk Ultimate Adjustable Upper Control Arms for Toyota Prado 120/150 and FJ Cruiser

Fine-tune your lifted Toyota's suspension geometry with Blackhawk Ultimate Adjustable Upper Control Arms BHU3841P. Designed for the Prado 120 Series, Prado 150 Series and FJ Cruiser, these forged arms allow on-vehicle camber and caster adjustment to help improve handling and reduce alignment-related tyre wear.

Features

  • On-vehicle adjustment: Fine-tune camber and caster to suit your suspension setup, with 1 degree of additional caster in Blackhawk's recommended baseline settings.
  • Forged construction: Aluminium main frames combine strength with low weight, supported by forged 4140 bush apertures.
  • Secure alignment settings: Billet-machined 4140 adjusters and a proprietary dual-locking nut system hold the selected adjustment.
  • High-articulation ball joints: Greaseable, serviceable ROADSAFE joints offer 80 degrees of articulation and use high-strength 4140 chromoly steel.
  • Everyday comfort: OE-specification rubber bushes help isolate vibration.
  • Durable finishes: Nitride-treated adjustment threads resist wear and corrosion, while e-coating protects the arms and bush apertures.
  • ABS line retention: Supplied clamps secure the ABS leads to the control arms.

Specifications

  • Brand: Blackhawk 4x4
  • Range: Ultimate Adjustable Upper Control Arms
  • Part number: BHU3841P
  • Vehicle compatibility: Toyota Prado 120 Series, Prado 150 Series and FJ Cruiser
  • Lift settings: Factory height through to 100mm suspension lift, as detailed in the BHU3841P fitting guide.
  • Replacement ball joint: BJ3841ULTE
  • Replacement bush: S0525R

Developed using CAD modelling and finite element analysis, with physical validation at Melbourne-based NATA testing facilities. Blackhawk lists the Ultimate range as NCOP and ADR compliant and provides supporting engineering documentation online.

Inclusions

  • Left and right upper control arm assemblies with ball joints, bushes and adjustment components
  • 2 ABS lead clamps and associated mounting screws
  • 2 Blackhawk Ultimate adjustment spanners
  • 1 bushing alignment rod, 16mm diameter
  • Quick guide

Frequently Asked Questions

Why upgrade the upper control arms after a suspension lift?

A lift changes wheel alignment. Adjustable arms provide additional camber and caster correction to help restore suitable settings for your vehicle.

Is a wheel alignment required after installation?

Yes. Blackhawk requires a wheel alignment immediately after fitting. Installation should be completed by a qualified mechanic with specialist 4WD suspension knowledge.

Do the ball joints require maintenance?

Don't take our word for it...

  • Good service, great price. Happily put in some upper control arms I already had, where other companies only wanted to put in their own brand gear. Cheers

    Brendan Wheeler
    Google Review

  • Purchased some rear super heavy duty leafs of these guys for my Navara for self install, well priced compared to the other major brands and very helpful in store. No pushy sales techniques just giving me advice on what I needed and even came out and had a look at the car to see. Very good experience.

    Roan Davy
    Google Review

  • The customer service here is absolutely outstanding! I can’t recommend the team at SSA enough. They treated me and my 3-year-old twins so well kids love the hats, stickers, and especially the cupcakes.I really appreciate the exceptional service. I’d give them 10 stars if I could! They went above and beyond for my Hino 4x4. You guys rock! Thank you so much!

    Fredrick Ottaway
    Google Review

  • About 4 years ago I had a spring upgrade on my 2012 Toyota hilux. Their quote was reasonable and were prompt getting the job done as I was living at Dalby and didn't have alot of time.The Ute sits up higher but not ridiculously high and sits even with the canopy on the back. It looks great. Still so happy with the job they did. Thanks again guys!! 👍

    Andrew Wilde
    Google Review

What components are included in a suspension upgrade?

A typical suspension upgrade may include:

  • Coil springs or leaf springs
  • Shock absorbers
  • Bushings and mounting hardware

Higher-end or complete kits may also include:

  • Upper control arms
  • Adjustable components
  • Extended brake lines

Each component works together to improve ride quality, load handling and off-road performance.

How long does suspension last?

Suspension lifespan depends on usage and conditions.

Typical lifespan:

  • 40,000–80,000 km under normal use
  • Less in harsh off-road conditions

Factors affecting lifespan:

  • Load weight
  • Terrain (corrugations, off-road)
  • Driving style

Regular inspections help identify wear early.

Do I need a wheel alignment after installing suspension?

Yes — a wheel alignment is essential after any suspension upgrade.

Lifting a vehicle changes:

  • Camber
  • Caster
  • Toe angles

A proper alignment ensures:

  • Correct tyre wear
  • Stable handling
  • Safe driving performance

Can I install suspension myself?

While some experienced DIYers can install suspension, professional installation is strongly recommended.

Reasons include:

  • Safety-critical components
  • Correct torque settings
  • Proper alignment required after installation

Incorrect installation can lead to poor handling, premature wear or component failure.

Will suspension lift affect towing?

Yes — in a positive way when done correctly.

Upgraded suspension improves:

  • Load handling
  • Vehicle stability
  • Reduced rear sag when towing

For towing setups, rear springs are often selected specifically to handle tow ball weight and prevent excessive squat.

Do I need a GVM upgrade?

A GVM (Gross Vehicle Mass) upgrade may be required if your fully loaded vehicle exceeds its legal weight limit.

This is common when adding:

  • Bull bars and winches
  • Canopies and drawer systems
  • Roof loads and towing setups

A GVM upgrade increases your legal carrying capacity but must be engineered and certified to remain road legal.

What’s the difference between light, medium and heavy-duty suspension?

Spring rates determine how much weight the suspension is designed to carry:

  • Light duty: Minimal accessories, daily driving focus
  • Medium duty: Bull bar, roof racks, occasional loads
  • Heavy duty: Constant load (canopy, drawers, tools, long-range tanks)

Running springs that are too heavy for your setup can result in a harsh ride, while springs that are too light will sag and reduce performance.

What suspension setup do I need for my vehicle?

The correct suspension setup depends on how your vehicle is used and what accessories are fitted.

Key factors include:

  • Constant load (bull bar, winch, canopy, drawers)
  • Occasional load (tools, camping gear, towing)
  • Intended use (daily driving, touring, off-road)

Suspension is designed around weight. If your vehicle carries constant accessories, you’ll need heavier-rated springs to maintain ride height and control. If your vehicle runs light most of the time, a medium setup will provide better comfort and compliance.

How much lift should I choose?

Most 4WD suspension upgrades provide 40–50mm of lift, which is ideal for:

  • Improved ground clearance
  • Better approach and departure angles
  • Clearance for slightly larger tyres

In Australia, lift limits are regulated, and going beyond ~50mm may require engineering approval. More lift does not always mean better performance — suspension geometry, ride quality and reliability must all be considered.

Will upgraded suspension improve ride quality?

In most cases, yes — when matched correctly to the vehicle’s weight.

Factory suspension is a compromise. Upgraded suspension is designed to:

  • Better control added weight
  • Reduce body roll
  • Improve stability when towing or loaded

However, heavier-duty springs can feel firmer when the vehicle is empty. Choosing the correct spring rate is critical to balancing comfort and performance.

Does it come with a warranty?


Piranha and Bluemax suspension systems are engineered for durability and supported by a 3-year or 60,000km warranty, ensuring long-term performance and reliability.

Conditions apply. Refer to warranty terms and conditions for complete coverage details.

See here