
Upgrading cars in Forza Horizon 5 is a systematic process of installing new parts and fine-tuning their settings to improve performance for specific race types. The core strategy involves first identifying your car's purpose—whether it's for road racing, off-roading, or drag strips—and then methodically upgrading its engine, platform, tires, and aerodynamics to fit that role. Tuning the car after installing parts is equally critical to unlock its full potential.
The upgrade process begins in the Garage or at any Festival Site. Select a car and choose the "Upgrades & Tunes" option. From there, you can enter the "Car Mastery" skill tree for some vehicles or go directly to "Install Upgrades."
Performance Parts Categories:
After installing parts, you must Tune Your Car. This adjusts the settings of your new components. Key tuning aspects include gear ratios for optimal acceleration, tire pressure, suspension stiffness, and differential settings. Don't just install the highest class parts; a well-tuned A-class car can often beat a poorly tuned S1-class car.
Here is a comparison of common upgrade paths for different race types:
| Race Type | Primary Focus | Key Upgrades | Recommended Car Class |
|---|---|---|---|
| Road Racing | Balanced Handling & Power | Race Tires, Sport/Race Suspension, Engine Power | A (800) to S1 (900) |
| Off-Road/Cross Country | Suspension & Durability | Off-Road Tires, Rally Suspension, AWD Conversion | A (800) to S1 (900) |
| Drag Racing | Maximum Acceleration | Engine & Turbo Upgrades, Drag Tires, AWD Conversion | S2 (998) |
| Drifting | Steering Angle & Power | Drift Suspension, Drift Differential, Lockable Differential | Any, often lower classes |
The key is to experiment. Use the "Test Drive" feature after each major upgrade to feel how the car's behavior has changed. Many players also download and apply pre-made tuning setups from the community, which is a great way to learn what works.

Honestly, I just dive right in. I pick a car I like, go to the upgrades menu, and start the parts that sound cool—big turbo, race tires, the works. I don't overthink the tuning stuff; I just max out the car's class and go race. Sometimes it handles like a dream, sometimes it's a mess, but that's half the fun. You learn what works by just getting out there and driving. It's my virtual garage to mess around in.

For competitive racing, upgrading is about maximizing performance within a specific class limit. You don't just add every available part. Instead, you strategically choose upgrades that give you the best power-to-weight ratio and handling for your target class, say A-800. This often means installing a engine swap or a specific turbo, combined with weight reduction and race tires. The real secret is the tuning afterward—dialing in the gear ratios, camber, and downforce to create a car that's not just fast, but predictable and easy to drive at the limit.

I'm all about the look. My upgrade process starts with the visual customizations. I'll spend an hour just picking the perfect rims and a killer paint job. Then, I'll add just enough performance parts to make sure the car isn't a total slouch in a race. A little engine upgrade, some better brakes, and sport tires are usually enough for me. I want a car that turns heads when I'm cruising on the highway, not just one that sets lap records. For me, style is the ultimate upgrade.

I focus on value. I start with the tires—they give you the biggest handling improvement for your credits. Then I look at weight reduction; a lighter car is faster and handles better without needing more power. Only after that do I consider engine upgrades. I always test drive after each change to see if it's worth the cost. I also check the auction house for cars that are already partially upgraded. It’s a smarter way to build a competitive car without spending a fortune from scratch.


