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DB4, DB5 and DB6 Brake System Upgrades

All models come with disc brakes on both front and rear wheels. Whilst the DB4 came with Dunlop disc brake units, the DB5 and later cars came with a Girling system. Girling braked cars come with a twin circuit braking system with separate servos for front and rear brake circuits.

General Characteristics

Dunlop braked cars are fitted with a single circuit system, single servo and twin pot callipers for both front and rear brakes.

In contrast, the Girling brake system uses triple pot callipers on the front and twin pot callipers on the rear, with pads of significantly greater size. The handbrake acts on the rear discs with a separate cable operated brake calliper.

What can be done to improve things?

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DB4 Safety & Fast Road Brake System Upgrades

An attractive option for the DB4 owner is to upgrade the brake system to the twin circuit, twin servo Girling brake system fitted to the DB5 and DB6.

If even better brake system performance is required, then the system can be further modified with ventilated front discs and modern three pot brake callipers.

The DB4 fast road brake options are:

Option 1

  • Upgrade to twin circuit, twin servo hydraulic system

     

Option 2- Girling brake system upgrade

As option 1 plus

  • Girling discs front

  • Girling discs rear

  • Girling 3 pot disc brake front callipers

  • Girling 3 pot disc rear callipers

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Option 3 – Enhanced fast road system

As option 1 plus

  • Ventilated front discs

  • AP racing four pot front brake callipers

    Girling 3 pot disc rear callipers

    AP racing master cylinder kit

    Goodridge front and rear brake hoses

Fitting this upgrade also demands the fitting of 6.5J wire wheels to provide the necessary clearance for the front disc and calliper assembly.

DB5 and DB6 Fast Road Brake System Upgrades

All Girling disc twin circuit brake systems are fitted with twin servos that provides totally separate front and rear hydraulic systems.

The recommended DB5 and DB6 fast road options are:

Option 1

  • Uprated servos

  • Fast Road pads

Option 2

  • Option 1 plus

  • Ventilated front discs

  • AP racing four pot front brake callipers

    AP Racing master cylinder kit

    Goodridge brake hoses

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