GU with LS1 V8 Engine – Hydraulic Brake Booster Upgrade

AUD $1,695.00 (Excl. Tax AUD $1,540.91)

Out of stock
SKU: MFK20140
Marks 4WD

Hydraulic Brake Booster Upgrade Kit to suit GU / Y61 Nissan Patrol (non-ABS) Models with an LS1 V8 engine

The Marks 4WD kit utilises the AC Delco hydraulic brake booster units sourced from AC Delco in the USA. Our workshop then completely strips down and machines each unit for a direct bolt-in fit to the particular vehicle model.

This style of hydraulic unit has been used in braking systems for decades in most Ford and Chevrolet heavy-duty vehicles where they are well proven for reliability and performance.

The hydraulic brake booster unit connects in line with your existing power steering pump without affecting the operation or feel of the factory steering.

As the line pressure in the braking system is increased when using the hydraulic unit from around 1,000 PSI up to around 2,000 PSI, we recommend replacing your old factory rubber brake lines with our Marks 4WD ADR approved stainless steel braided brake lines.

Our engineers have fully tested the braking system on the vehicles to ensure they meet current Australian vehicle standards enabling us to provide the necessary documentation to assist with having the unit approved on your 4WD.

The test results braking from 100km/h demonstrates why the upgrade is an important addition to your vehicle.

(Note: Results will vary with tyre dimensions, vehicle model and modifications)

Test vehicle – 79 series dual cab LandCruiser weighing 3780kg

  • Braking Distance – Standard factory vacuum – 98 metres
  • Braking Distance – Marks4wd Hydraulic booster58 metres

Advantages of our Upgrade

  • Reduced pedal effort
  • Increased stopping power
  • More responsive brake pedal
  • Engineered to meet VSB14 requirements

Kit Includes

  • Genuine AC Delco hydro brake booster – modified to suit each vehicle model
  • All required hoses, hose clamps, bolts & washers
  • Downloadable Instructions (requires login)

Optional Brake Lines

Optional Products

  • High temperature brake pads
  • High quality slotted brake rotors
  • New brake master cylinder


  • The engine must be fitted with a cast-iron power steering pump to suit this kit
  • (Cast-iron power steering pumps are fitted to VT-VY LS engines)
  • The hoses supplied with this unit will only fit right-hand drive vehicles
  • Not suitable for vehicles fitted with ESC (Electronic Stability Control) 08/2012 on

To Suit

  • Nissan Patrol – GU / Y61 (non-ABS) vehicle fitted with an LS1 V8 engine
  • Does not fit drum brake rear models

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    MFK20130 Instructions

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