D400D
100–400 PI
Entry-level, daily drivers
Browse D tunesFH6 Guide
PI Classes Explained
Understanding the Performance Index system in Forza Horizon 6
What is PI?
Performance Index at a glance
Every upgrade pushes your number up — and your class letter with it.
The Performance Index (PI) measures your car's total performance. Engine, tires, weight reduction, and aero all add up. Your PI decides which opponents you face and which events you can enter.
- PI range
- 100–999
- Classes
- 8
- New in FH6
- R class
The eight classes
Each bracket has a PI ceiling. Tap a class to browse tunes tuned for that range.
C500C
401–500 PI
Hot hatches, classic sports
Browse C tunesB600B
501–600 PI
Modern sports, retro muscle
Browse B tunesA700A
601–700 PI
Supercars, track toys
Browse A tunesS1800S1
701–800 PI
High-end supercars, race cars
Browse S1 tunesS2900S2
801–900 PI
Hypercars, extreme track toys
Browse S2 tunesR998R
901–998 PI
Pure race cars, prototypes (new in FH6)
Browse R tunesX999X
999 PI
The absolute peak, unlimited PI
Browse X tunesPicking the right class
Match your class to the discipline — too much PI on dirt or CC often hurts more than it helps.
Road Racing
A (601–700) — balance of speed and control
Street Racing
A or S1 — traffic gaps, short bursts
Drift
B or A — power without losing control
Drag
S1 or S2 — maximum speed and grip
Offroad / Dirt
C or B — too much speed turns unstable
Cross Country
B or A — mixed terrain and jumps
Touge
A or S1 — mountain-pass balance
Ready to find a setup?
Jump straight into community tunes filtered by PI class — voted on by other players.