Toyota 300 Series Land Cruiser

Ramp Up Your Performance with Our Range of Modifications, Upgrades and Tuning Services, Tailored to the 300 Series Land Cruiser.

300 Series

FJA 300

LC 300

Model Year - 2021 Onwards

Maximise Your 300 Series Potential

300 Series Performance Upgrades & Tuning

Just Autos is your go-to destination for Toyota 300 Series Land Cruiser performance upgrades and tuning services. As the first diesel performance specialists in Australia to develop custom ECU remaps for this model, we offer a range of performance package upgrades, standalone upgrades, tuning services and mods to help you turn potential into power.

Toyota’s new flagship model comes from a long line of Land Cruisers beloved by their owners and known for their performance capabilities. Like their older VDJ70 and 200 Series siblings, the 300 Series packs quite a punch from factory – but we can help you take factory performance to the next level! 

Since its release in late 2021, the Just Autos team have been hard at work developing custom remaps that achieve 280+ horsepower at all four wheels, enhanced throttle response and improved driveability. Coupled with our performance upgrades, we can turn your 300 Series into a force to be reckoned with. Choose from our selection of upgrade packages, designed to help you see significant performance changes from your diesel, or contact our team to find out how we can transform the outputs of your Land Cruiser. 

Just Autos Multi-Mapping

300 Series Multi-Mapping Is Here!

Introducing Just Autos’ latest innovation: Multi-mapping is now at your fingertips!

Our multi-mapping feature empowers you to effortlessly transition between distinct engine tunes tailored to your specific driving demands. Whether you’re towing heavy loads, venturing off-road, or simply going about your daily commute, this technology provides you with the best of both worlds. Experience the power and torque you require precisely when you need it, while enjoying the fuel efficiency and exceptional drivability you desire.

It’s available now – get ready to revolutionise your driving experience!

Performance packages

300 Series Performance packages

300 Series Package 1

Designed to provide the best bang-for-buck!

300 Series Package 2

Ramp up your 300 Series performance!

300 Series Package 3

Take your 300 Series performance to the next level!

300 Series Package 1

Designed to provide the best bang-for-buck performance improvements from factory-standard.

Our performance package 1 for the 300 Series Land Cruiser includes a Custom ECU Remap and a Just Autos airbox. This package is a great bang for your buck option to start your performance journey, as it is budget-friendly while still delivering impressive output improvements.

  • Great bang for buck start to your performance journey
  • Budget-friendly while still seeing great improvements in output
  • Average increases of 30-140 % torque at all four wheels
  • No compromise to the reliability of the vehicle
Dino package 1 Gains

300 Series Package 2

Ramp up your 300 Series performance and experience unparalleled power from your Land Cruiser.

Our performance package 2 for the 300 Series Land Cruiser includes a range of high-quality components designed to boost your vehicle’s performance. This package includes the following components:


  • Just Autos custom ECU remap, which is specifically designed to improve engine performance and power output.
  • 4″ Exhaust, available in both DPF back and Turbo back options, which is made from full stainless steel and features a single 4″ exit for maximum performance.
  • Just Autos Airbox, which is designed to fully seal the airbox and prevent dusting, a common issue that can cause turbo/engine failures. The airbox retains the factory air filter for ease of servicing and availability of parts, no matter your location.
  • Fuel Filter Bracket to ensure consistent fuel supply and protect the engine from contaminants.
Dino package 2 gains

300 Series Package 3

Take your 300 Series' performance to the next level with our top performance package for your Land Cruiser.

Our performance package 3 for the 300 Series Land Cruiser is a comprehensive package designed to take your vehicle’s performance to the next level. This package includes the following high-quality components:


  • Just Autos custom ECU remap which is specifically designed to improve engine performance and power output.
  • 4″ Exhaust, available in both DPF back and turbo back options, which is made from full stainless steel and features a single 4″ exit for maximum performance.
  • Just Autos Airbox, which is designed to fully seal the airbox and prevent dusting, a common issue that can cause turbo/engine failures. The airbox retains the factory air filter for ease of servicing and availability of parts, no matter your location.
  • Just Autos Heat Exchanger, which is crucial for maintaining intake temperatures while towing and ensures consistent power and torque.
  • Fuel Filter Bracket to ensure consistent fuel supply and protect the engine from contaminants.
300 series

300 Series Land Cruiser
Performance Upgrades & Mods

Choose your upgrades independently with help and advice from our experienced diesel performance technicians. 

300 Series Exhaust Upgrades

Upgrade your FJA300 Series Land Cruiser with Just Autos’ performance exhaust kit, which replaces the factory exhaust system with a high-flowing, 4-inch-diameter exhaust that’s designed to deliver improved torque, power, and throttle response throughout the rev range. Not only does it improve your driving experience, but it also provides a great sounding V8 exhaust.

Our performance exhaust systems are available for DPF or turbo back models.


Getting an aftermarket airbox assembly for your 300 Series Land Cruiser can help your engine achieve better airflow over the factory airbox, which is critical when tuning. Toyota factory airboxes are also notorious for poor dust-proofing.

Getting an aftermarket airbox can save you money in the long run as getting dust into your engine can cause irreversible damage to it.


Just Autos offers a water-to-air intercooler upgrade which helps maintain engine temperatures while towing. Our in-house developed heat exchanger provides additional cooling capabilities, added capacity to the heat exchanger system, and the ability to drastically reduce intake temperatures in even the most challenging driving environments. 

With a staggering 54% decrease in engine temperatures, our heat exchanger upgrade can keep your FJA300 running cool, ensuring that maximum power and torque outputs are maintained.


Just Autos are the first diesel performance specialists EVER to offer tailored ECU remapping services for the new 300 LC. We have a team of master tuners who can remap your engine to perform optimally under any condition, whether it’s towing a heavy load or off-roading in the sand dunes.

ECU remapping is the process of reconfiguring the engine control unit to optimise performance. This involves changing the way the engine runs by altering things like fuel delivery, ignition timing, and boost pressure. By remapping your ECU, we can improve your engine’s performance without compromising its reliability.


Just Autos’ snorkel upgrades for the 300 Series LandCruiser are a game-changer. Designed for peak off-road performance, they protect your engine from dust and water while ensuring longevity. Built tough, they’re perfect for any terrain. Upgrade your LandCruiser with Just Autos and conquer the great outdoors with confidence.


Just Autos’ offers the fuel filter bracket tailored for the 300 Series LandCruiser. Precision-crafted for durability, this bracket secures the fuel filter, preventing damage during off-road excursions. It guarantees reliable fuel supply, making it indispensable for adventurous LandCruiser owners. Elevate your off-road experience with Just Autos and ensure your LandCruiser’s peak performance and durability.

Custom 300 Series ECU Remaps & Tuning

Remap & Tune Your 300 Series Land Cruiser

Just Autos has been hard at work, developing custom remap files for the 300 Series Land Cruiser. We were lucky to be the first company in Australia to get their hands on the 300’s ECU, even prior to the 300 Series release date!

This has given us the opportunity to have a large head start on our competitors and work towards offering our customers a truly unique service. During our testing, we have had the opportunity to work with some other great Australian companies; FATZ & FFM, to create awesome products for our 300 Series clients. 

Our testing has revealed some of the limitations that the vehicle has, and provided the opportunity to see what is possible when the vehicle does not have limiting factors like emission control devices, which are not suitable for road use. This does give a great indication of what is truly possible with the engine and drive train without reservations in a controlled environment.

Contact the Just Autos team today to bring your LC300 in for custom ECU tuning or to choose from our selection of premium performance upgrades.

Just Autos owner and diesel performance specialist Matt

300 Series Dyno & Performance Tuning

Our workshop is fully equipped with a range of high-tech tuning gear and equipment, including our dynos. We have a team of trained, in-house master tuners who are able to write their own ECU remap files. This allows us to completely customise your 300 Series’ remap to suit your performance needs. 

Our team will work with you to assess the current state of your engine and your tuning options. We treat each vehicle that enters our workshop individually, giving each engine our undivided attention during the tuning process. 

Here’s how it works:

300 Series Land Cruiser Upgrades & Mods

Transform Your 300 Series LC

The 300 Series comes considerably under-tuned straight from the factory. This means that there is a wide range of upgrades available to the vehicle. This includes performance enhancement opportunities through ECU remapping, dyno tuning, performance packages and part upgrades.

When it comes to enhancing the performance of Land Cruisers, Just Autos are the experts. Apart from our performance package upgrades, we offer a range of other upgrades and replacements that can improve your vehicle’s performance – no matter the terrain.

It’s no secret that Just Autos is the best Toyota specialist in the country. We provide modifications, upgrades, and performance tuning for various Toyota models, including previous Land Cruiser models, the Toyota Hilux, and the Toyota Prado

Experience unprecedented performance from your 300 Series Land Cruiser – contact our team today for a custom quote or to book your LC in for the Just Autos experience.

What Our Customers Have to Say

300 Series Performance Tuning and Upgrades

Power Up Your 300 Series Land Cruiser!

The Toyota Land Cruiser is a legend in the off-roading world. The current 200 Series model builds on that legacy with the new 300 Series Land Cruiser, fitted with features and updates to make it more comfortable for passengers.

Bring your Land Cruiser to Just Autos on the Sunshine Coast for a tune-up if you want to see a difference in how it performs and the upgrades suited for your needs. Our staff includes some of the most experienced common rail diesel experts, and we can advise you on what choices are open to you and how to go about making changes to get the most out of your Toyota Land Cruiser 300 Series.

We’ve worked on a wide range of Toyotas, including the 70 Series and 200 Series Land Cruiser models. Our experience in working with these engines gives us the right expertise to enhance your Land Cruiser’s performance.

Aftermarket performance exhaust system on a Toyota 300 Series Land Cruiser from Just Autos

Queensland's Toyota Diesel Performance Experts

More Power, More Torque, More Engine!

Toyota’s diesel engines have come a long way in recent years and the popularity of diesel performance is on the rise. Like most of Toyota’s diesel engines, the 300 Series already offers impressive torque and power off the factory floor, but with some basic modifications, by our professional diesel tuning specialists, the results are astounding! Just Autos is your one-stop-shop for Toyota 300 Series Land Cruiser upgrades, remaps, and ECU tuning. We offer custom ECU remaps and a range of performance package upgrades to take your driving experience to the next level. 

Greater Torque & Power

Diesel performance tuning removes the limitations set by the manufacturer, allowing for better torque and power outputs.

Increased Fuel Economy

Custom tuning or replacing parts with diesel performance parts can greatly reduce your fuel consumption and improve your kilometres per litre.

Diesel Performance Parts

We have a large variety of part upgrade choices, for a selection of Toyota models. Get in touch for more info or visit our workshop today!

Toyota 300 Series Land Cruiser Performance

What's Under the Hood of the New Land Cruiser?

Unlike the 200 Series, the 300 Series Land Cruiser is not available in the venerable 4.5-litre twin turbo diesel V8. Instead, the new Land Cruiser runs on a 3.3-litre twin-turbo diesel V6, with higher power and torque figures compared to the V8 of its predecessor: the F33-FTV 3.3-litre turbo diesel V6 is said to provide 227kW and 687Nm – a healthy power increase over the 200 Series’ 200kW/650Nm.

Joining the diesel engine is a 3.5-litre twin-turbo petrol V6. Toyota intends to electrify its entire range of vehicles by 2025, so a hybrid option will also likely become available in Australia at a later point. And although the timing and release dates aren’t yet clear, many speculate that both the diesel and petrol variants will have battery assistance.

The 300 is not just an update of the body style; it’s everything you could ever want from a Land Cruiser, and more. The 300 isn’t just bigger than the 200 Series; it’s better equipped for every scenario you could ever throw at it. 

Australia's Ultimate Diesel Performance Experts

Achieve More Power & Torque With Just Autos

Just Autos is a nationally-known brand renowned for our diesel performance expertise. No one cares more about your car’s performance than we do! That’s why our team works hard to ensure we understand your performance needs before getting stuck in under the hood of your Toyota to make those dreams a reality. 

Just Autos is based in Nambour, on the Sunshine Coast in Queensland, Australia.

Contact Us

Get in Touch

Complete the form with your enquiry and the team at Just Autos will reply to your email within 24 hours

Quote Form - Popup

Your Toyota Specialists

Unleash the power potential in your Toyota’s engine with our range of custom performance tuning services and variety of vehicle upgrades, mods and more!