The Kellison J4 is a rare fiberglass-bodied kit car that a few fans hope shows up as a classic sports pick in GTA 6. The real car is a low, light 1950s and 1960s special built for looks and speed on a home-built chassis. Rockstar has not confirmed it, and there is no in-game name for it.
There is no in-game name or unlock for this, so treat it as a niche fan hope. The interest comes from how rare and distinctive the real kit car is. If something like it appears, expect a light, low-slung sports car with lively handling that depends heavily on whatever engine sits underneath.
| Mod | Slot | Cost | Stat effects | Notes |
|---|---|---|---|---|
| Engine Upgrade | Engine | 12% of base | Acceleration +8 · Speed +5 | — |
| Turbo | Engine | 10% of base | Speed +6 · Acceleration +4 | — |
| Transmission | Engine | 8% of base | Acceleration +5 | — |
| Brakes | Handling | 4% of base | Braking +10 | — |
| Suspension | Handling | 3% of base | Handling +6 | — |
| Sport Wheels | Handling | 5% of base | Handling +2 | — |
| Armor Plating | Protection | 9% of base | Armor +25 · Acceleration -3 | — |
| Bulletproof Tyres | Protection | 2% of base | Durability +15 | — |
| Weapons & Countermeasures | Combat | 15% of base | Firepower +20 | — |
| Respray & Cosmetics | Cosmetic | 3% of base | — | — |
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.
