FAS 850 Package | TRX
$7499.99
The FAS 850 Package is the perfect balance between drivability and performance, pushing your Hellcat platform to 850 WHP with pulley upgrades, injectors, pinned crank, thermostat, and full dyno tuning.
Product Details ▾
The FAS 850 Package is one of the most popular Hellcat upgrade options for customers who want to enjoy factory-like drivability while unlocking serious performance gains. With a reliable 850+ wheel horsepower target, this package includes all the key supporting mods to keep your vehicle safe, cool, and consistent.
Every build is installed and dyno tuned in-house by FAS Motorsports, featuring custom engine and transmission calibration by 1320Tunez. The package is designed to maximize power on pump fuel while ensuring everyday comfort and reliability.
Some Optional Upgrades
- Cold air intake system
- Longtube headers with race midpipes
- Upgraded heat exchanger
- Drag radial tire package for improved traction
Typical turnaround time of 4–5 business days, the FAS 850 Package is a proven path to strong, reliable performance without compromising daily usability.
Specifications
| Target Power | 850+ whp |
| Fuel | 93 Octane Pump Gas |
| Induction | Stock supercharger with upper & lower pulley upgrade |
| Reliability Mods | Dual pinned crank |
| Cooling | 180° thermostat |
| Ignition | NGK spark plugs |
| Tuning | PCM unlock + custom engine & trans calibration (1320Tunez) |
| Turnaround Time | 4–5 days |
Attributes
| Power Level | 850+ WHP |
| Fuel Type | 93 Octane Pump Gas |
| Induction | Stock Supercharger + Pulley Upgrades |
| Reliability | Dual Pinned Crank + Upgraded Injectors |
| Cooling | 180° Thermostat |
| Tune Provider | 1320Tunez |
| Combatibility | RAM TRX |
| Turnaround | 4-5 Days |
Included in Kit
| FAS upper pulley kit | 1 |
| Predator lower pulley kit | 1 |
| Dual pinned crank upgrade | 1 |
| Upgraded injectors | 1 |
| 180° thermostat | 1 |
| NGK spark plugs | 1 |
| Bypass cable | 1 |
| ECU unlock | 1 |
| All tuning credits included | 1 |
| Full PCM & TCU custom dyno tuning by 1320Tunez | 1 |
Important Notes
Install Only Package – designed for Hellcat platform vehicles; TRX
- Dyno results may vary based on fuel quality, altitude, and supporting modifications.
- Vehicle must be delivered to FAS Motorsports; mail-order is not available.
- Typical lead time is 1-3 weeks | Install completion time: 4–5 days (expedited service available).
- Lead times vary; please contact us for current scheduling.
- Package completion requires a minimum of 4 days, depending on optional upgrades.
Related Products
Recommended Upgrades
FAS 900 Package | Hellcat Platform
$9999.00
FAS 800 Performance Package | 800 HP Turn-Key Build (2018+ F-150)
$14999.00
FAS 1000 Performance Package | Trackhawk & Durango
$16999.00
FAS 1000 Performance Package | Charger & Challenger
$16999.99
FAS 1000 Performance Package | TRX
$17999.00
FAS 1000 Performance Package – 1000 HP Turn-Key Build (2018+ F-150)
$19999.99