PDI 4WD Brake Upgrade Parts & Kits suit Landcruiser HDJ79 HZJ79.

Improve braking performance in your Toyota 79 Series with the PDI Dual Diaphragm Brake Booster engineered to deliver significantly higher hydraulic brake assist and increased stopping confidence, especially in heavy touring and towing applications.

Compared to standard factory boosters and common “30% upgrade” options, the PDI brake booster provides up to a 50% increase in assist ratio, making it one of the largest and most effective brake booster upgrades available for the 79 Series Land Cruiser range.

Key Features & Benefits

• Dual diaphragm design for increased brake assist
• Larger booster diameter for higher hydraulic pressure
• Improved braking response and reduced pedal effort
• Designed for heavily loaded vehicles, towing, GVM upgrades and larger tyres
• Engineered to exceed ADR brake performance specifications
• Direct improvement in stopping performance and driver confidence

The increased brake assist allows the braking system to achieve maximum performance from standard and upgraded tyre setups while improving overall pedal feel and emergency stopping capability.

Designed for Heavy Duty 4WD Use

The PDI Dual Diaphragm Brake Booster is particularly effective on vehicles fitted with:

• GVM upgrades
• Larger wheel and tyre packages
• Touring accessories and canopies
• Towing setups and increased GCM loads

For demanding 4WD applications, improved brake assist can make a substantial difference in vehicle control and stopping distance.

Premium DBA Brake Components

To complement the upgraded booster, we recommend pairing the system with premium DBA braking components.

DBA 4000 Series Rotors

DBA 4000 Series rotors feature advanced ventilation and high carbon alloy construction for improved heat dissipation, durability and resistance to brake fade under heavy loads.

DBA XP Brake Pads

DBA XP pads are ideal for 4WD and touring vehicles, delivering strong initial bite, excellent cold performance and reliable braking under everyday driving and heavy duty conditions.

Why Upgrade Your 79 Series Brakes?

Factory Toyota 79 Series brakes are widely known for lacking stopping power, especially once the vehicle is fitted with accessories, larger tyres, canopies or towing setups. Increased vehicle weight and wheel size can significantly reduce braking performance, resulting in longer stopping distances and increased pedal effort.

The PDI Dual Diaphragm Brake Booster is designed to address these shortcomings by delivering substantially higher brake assist and improved hydraulic pressure. The result is stronger braking performance, better pedal feel and increased driver confidence both on and off road.