There are many famous off-road vehicle brands in the world, which are known for their excellent off-road performance and durability. Here are some famous off-road vehicle brands:

1. Jeep: Jeep is a pioneer in the field of off-road vehicles, and its models such as the Jeep Wrangler and Jeep Cherokee are very popular among consumers.

2. Land Rover: Land Rover is a British car manufacturer known for its luxurious off-road models such as the Range Rover and Land Rover Discovery.

3. Toyota: Toyota produces a series of durable off-road models, including the Toyota Land Cruiser and Toyota 4Runner.

4. Ford: Ford's off-road SUVs, such as the Ford Bronco and Ford Expedition, are also popular.

5. Chevrolet: Chevrolet produces off-road SUVs such as the Chevrolet Tahoe and Chevrolet Suburban.

6. Nissan: Nissan Xterra and Nissan Patrol are some of the brand’s off-road models.

7. Mercedes-Benz: Mercedes-Benz has launched some high-performance off-road models, such as the Mercedes-Benz G-Class (also known as G-Wagen).

8. Subaru: Subaru is famous for its all-wheel drive technology, and its models such as the Subaru Outback and Subaru Forester have a good reputation in the off-road field.

9. Lexus: Lexus makes some luxury SUVs like the Lexus GX and Lexus LX that are capable of off-roading.

10. GMC: GMC makes some large off-road SUVs like the GMC Yukon and GMC Acadia.

Each of these brands has its own features and off-road models suitable for different off-road needs and budgets. When choosing an off-road vehicle to suit your needs, it is recommended to consider performance, reliability, comfort, and specific off-road capabilities.

Off-road vehicle modification is a broad activity aimed at improving a vehicle's performance, durability, and off-road capabilities to suit the needs and preferences of the driver. Here are some common off-road vehicle modification options:

1. Upgrade tires and wheels: Larger, more durable off-road tires can provide better traction and suspension while increasing the ability to negotiate obstacles. The right wheels can also improve your vehicle's appearance and performance.

2. Suspension upgrade: Upgrading the suspension system, including suspension lifting kits, shock absorbers, and springs, can improve the ground clearance and passability of the off-road vehicle.

3. Protective Devices: Off-road vehicles can be equipped with additional protective devices such as front and rear bumpers, differential guards, and fuel tank guards to prevent damage.

4. Differential locking: The differential locking system can improve traction and make the vehicle easier to drive in bad road conditions.

5. Increase power: Some off-road vehicle modification enthusiasts may upgrade the engine, air intake system, exhaust system, and electronic control module to increase horsepower and torque.

6. Safety gear: Off-road driving can involve dangers, so modifications can include additional safety gear such as rollover cages, cockpit protection, skid plates, and firefighting equipment.

7. Electronic equipment: Off-road vehicles can be equipped with navigation systems, backup power supplies, onboard communication equipment, and satellite tracking equipment to enhance navigation and communication capabilities.

8. Improve lighting: Add LED headlights, work lights, or additional headlights to improve visibility at night and in inclement weather.

9. Car body modification: Car body modification can include body painting, decorative strips, roof tents, and luggage racks to improve appearance and functionality.

10. Interior modifications: Interior modifications can improve driver and passenger comfort, including upgrades to seats, sound systems, dashboards, and interior materials.

Please note that off-road vehicle modifications require careful consideration, as incorrect modifications may affect the vehicle's performance and safety. before making any modifications.

It is recommended to consult a professional car modification shop or engineer to ensure that the modification is safe and compliant with regulations. Additionally, modifications may affect the vehicle's warranty, so check with the manufacturer for policies.