Toyota GDJ70 Series Land Cruiser
Maximise Power and Performance from Your GDJ70 Series Land Cruiser with Our Range of Diesel Performance Upgrades and Tuning Services.
GDJ70 Land Cruiser Upgrades & Tuning
Maximise Your GDJ70 Series Potential
Just Autos is your destination for Toyota GDJ70 Series Land Cruiser performance upgrades and tuning services. As industry-leading diesel performance specialists in Australia, we’ve developed cutting-edge ECU remapping and multimapping solutions specifically for this iconic workhorse, offering comprehensive performance packages, standalone upgrades, and expert tuning services to unlock your vehicle’s full potential.
These vehicles deliver impressive capability from the factory, but our specialised performance solutions can transform your GDJ70 into an even more formidable machine.
Premium GDJ Upgrade Parts
Why Settle For Stock?
Looking for a specific upgrade? Our team can help with additional modifications and upgrades for your GDJ70 Series, even if it already has existing upgrades fitted!
ECU Remap & Multi-mapping
Unlock your vehicle’s hidden potential with custom engine tuning that delivers optimal power and efficiency at the touch of a button.
Transmission Lock-up Kits
Exhaust Systems
Our 3” and 4” exhaust upgrades are designed to reduce back-pressure and improve exhaust flow—helping your engine operate more efficiently and support enhanced performance when paired with tuning.
Turbo & Injectors
Airbox System
While most factory air intake systems typically support airflow for engines up to approximately 270hp*, our in-house airbox assemblies are engineered for higher airflow capacity. Built with dust-resistant design, they’re developed to support better filtration and improved dust sealing—ideal for challenging Australian conditions.
Custom Upgrade Package
Upgrade Your GDJ70 with Custom Tuning
Cutting-Edge Performance Software
Toyota Land Cruisers are typically tuned from the factory with conservative settings to meet global standards and driving conditions. At Just Autos, our custom ECU remapping is designed to optimise engine parameters, helping unlock additional performance tailored to your needs.
With our tuning solutions, you can experience improved responsiveness and power delivery—especially in demanding towing or off-road situations.
Here’s How It Works
Connect & Analyse
We hook your vehicle up to our advanced test equipment, monitoring crucial metrics like air-fuel ratio, boost pressure, RPM, and more.
Simulation Drive
Next, your vehicle hits our dyno, simulating real-world conditions to capture baseline performance, so we know exactly where we’re starting from.
Precision Tuning
Our expert technicians fine-tune your vehicle by adjusting key parameters to optimise performance based on your setup and driving requirements.
Final Dyno Check
Your vehicle hits the dyno once more, allowing us to compare and see the full impact of the tuning and upgrades.
Built for Power. Tuned for Precision.
At Just Autos, we’re known for delivering high-quality, tailored diesel performance tuning. Backed by innovation and real-world results, we help you get the most out of your Toyota diesel engine—safely and effectively.
We don’t use generic tuning files. Each ECU remap is custom-written by our experienced tuners to match your engine’s individual setup. With the help of advanced dyno testing, we provide personalised advice and tuning designed to improve power, torque, and overall drivability.
GDJ70 Multimapping Tuning Packages
Our advanced ECU remapping and multi-mapping solutions for the GDJ70 Series are built to help you unlock more from your diesel engine. Choose a custom single-map tune for consistent performance, or opt for our exclusive multi-map upgrade that puts tuning flexibility at your fingertips.
With multi-mapping, you can switch between multiple driving profiles on the fly—from a smoother everyday driving setup to a higher-performance calibration designed for demanding conditions like towing or off-road use.
Tailored Recommendations for Every Drive
Find the upgrades that match your needs in no time. From off-road power to city efficiency, we have the skills and expertise to recommend and implement the perfect performance enhancements for your GDJ70.
