Aero & Body (Wing / Splitter / Widebody)
Cornering grip at the cost of top speed. Front aero is usually free; rear wing is the expensive half.
What it does
Aero upgrades work in pairs with the tuning sliders they unlock. The Race front bumper enables the front downforce slider; the Race rear wing enables the rear. Without the part, the slider is grey. FH6 added an aero balance slider on top of the per-axle values — but you need at least one aero part installed for it to do anything.
Front aero is usually cheap PI and worth installing on any road build above B-class. Rear aero is the expensive half — significant drag cost on top speed, only justified if the rear unhooks in fast corners (which becomes more common at S1/S2/R).
Widebody kits unlock wider tire fitment and sometimes additional aero adjustability. They cost real PI *and* add drag — only install them if you're actually using the wider tires or the unlocked aero. Cosmetic widebody is a PI waste.
Race hoods and bumpers also act as weight reduction (5–15 kg on the hood, more on combined kits). Stacks usefully with the main Race weight reduction part.
Options
PI-efficiency by discipline
| Option | Road | Dirt | Cross-country | Drift | Drag |
|---|---|---|---|---|---|
| Race front bumper / splitter | ● | ○ | ✗ | ○ | ✗ |
| Race rear wing | ● | ✗ | ✗ | ○ | ✗ |
| Widebody (with wider tires) | ○ | ✗ | ✗ | ● | ✗ |
| Race hood | · | · | · | · | · |
Decision rules
- 1.Front aero before rear aero. Front is cheap PI; rear is expensive drag.
- 2.Widebody only if you're actually using the wider tires or the unlocked aero. Otherwise it's cosmetics.
- 3.Race hoods stack with weight reduction — install whenever offered.
- 4.Avoid rear wing on cross-country and dirt — drag and pitch sensitivity hurt you on bumps.
Traps
Build smells that point here
- Widebody installed without wider tires or aero useRemove widebody — you're paying drag and PI for cosmetics.
- Rear wing on a long-straight speed circuitRemove rear wing or drop a tier — the top-speed loss outweighs cornering gain.