What is the best upgrade for the Toyota Land Cruiser?

I recently purchased a Toyota Land Cruiser and I'm looking to upgrade some of its features for better performance. Which upgrade do you recommend for this vehicle?

For better performance on off-road terrain, I recommend upgrading the suspension with heavy-duty shocks and springs. This will provide better stability and control.

To improve fuel efficiency, consider installing an air intake system. This will allow for better air flow and improve the engine's performance.

For a more luxurious driving experience, opt for a leather interior upgrade. Not only will it increase comfort, but also add value to your vehicle.

To enhance the appearance of your Land Cruiser, add a set of off-road tires. This will not only give it a more rugged look, but also provide better traction on dirt and gravel roads.