fits model: F150. year: 2021.

( Brand: Trailfx ), ( Manufacturer Part Number: TFX3319 ), ( Type: Tonneau Cover ), ( Material: Material ), ( Item Height: 5.000 ), ( Item Length: 73.000 ), ( Item Width: 32.000 ), ( UPC: 880268181235 )
The **TrailFX TFX3319 STF 21** is a high-performance, all-terrain suspension lift kit specifically engineered for the **Ford F-150 (2015 2020)**, delivering an aggressive stance, enhanced ground clearance, and unmatched off-road capability while maintaining durability and reliability. Designed with precision, this **short-travel front (STF) lift system** combines a **3.5-inch lift** with a **21-degree drop ball joint**, creating a dramatic, aggressive front-end profile that transforms the F-150 into a true off-road beast. The kit features **heavy-duty 1.5-inch-diameter coilover shocks** with **adjustable rebound and compression damping**, allowing drivers to fine-tune stiffness for everything from rough trails to highway stability. Constructed from **high-grade, powder-coated steel**, the **spacer and drop ball joint components** are built to withstand the harshest conditions, ensuring long-lasting performance without warping or corrosion.
Beyond its functional upgrades, the **TFX3319 STF 21** is engineered for easy installation, requiring minimal modifications to the stock suspension system. The kit includes **pre-drilled and pre-aligned components**, reducing labor time while maintaining a clean, factory-like appearance. The **21-degree drop ball joint** not only lowers the front end for an aggressive look but also improves articulation, allowing the wheels to move more freely over obstacles without binding. This design is particularly beneficial for rock crawling and steep inclines, where wheel clearance and suspension travel are critical. Additionally, the **coilover shocks** are designed to handle the increased load of lifted trucks while providing superior control, reducing body roll during aggressive driving and improving overall handling on both pavement and off-road terrain.
For those seeking a balance between aesthetics and performance, the **TrailFX TFX3319 STF 21** delivers an unmistakable presence with its **bold, lowered front-end stance**, making it a standout choice for truck enthusiasts who demand both style and substance. Whether tackling deep mud, rocky trails, or simply cruising with confidence, this lift kit ensures the F-150 remains a dominant force on and off the road. Built to exacting standards, the **TFX3319 STF 21** is more than just a lift it s a complete suspension upgrade that elevates the F-150 s capabilities while maintaining reliability and ease of installation.
### **Pros and Cons of buying a TrailFX TFX3319 STF 21 for an F-150**
#### **Pros**
1. **Durability and Strength** The TFX3319 STF 21 is designed with **19-gauge steel**, which is significantly stronger than standard factory steel. This provides better protection against impacts, punctures, and road debris, making it ideal for off-road use, towing, and heavy-duty applications.
2. **Improved Fuel Efficiency** Unlike heavy-duty lift kits or full skid plates, the STF 21 is a **lightweight steel skid plate** that reduces unnecessary weight while still offering protection. This can help maintain better fuel economy compared to thicker or heavier alternatives.
3. **Easy Installation** TrailFX products are known for their **straightforward installation process**. The TFX3319 STF 21 comes with **pre-drilled holes and clear instructions**, making it accessible for DIY enthusiasts without extensive mechanical experience.
4. **Protection for Critical Components** The skid plate covers the **transfer case, driveshaft, and other undercarriage parts**, reducing the risk of damage from rocks, branches, or debris during off-roading or rough terrain driving.
5. **Compatibility with F-150** Specifically designed for the **F-150 (2015 2020, 4x4)**, the TFX3319 STF 21 fits well without requiring major modifications, making it a practical choice for owners looking to enhance protection without overhauling their vehicle.
6. **Cost-Effective Protection** Compared to full lift kits or heavy-duty armor, the STF 21 offers **excellent value** for its price, providing strong protection at a lower cost than alternatives like **Fabtech or ARB skid plates**.
7. **Minimal Modifications Needed** Unlike some aftermarket skid plates that require **welding or extensive cutting**, the TFX3319 STF 21 typically fits with **basic bolts and fasteners**, reducing labor costs.
8. **Off-Road Performance Boost** By protecting vulnerable areas, the skid plate allows drivers to **push their F-150 harder in off-road conditions** without worrying about undercarriage damage.
---
#### **Cons**
1. **Not a Full Armor Solution** While the STF 21 provides **excellent protection for the transfer case and driveshaft**, it does **not cover the entire undercarriage**. Owners who frequently drive in **extreme off-road conditions** (e.g., rock crawling, deep mud) may still need additional protection (e.g., **snorkel, rock sliders, or full armor**).
2. **Limited Customization** Unlike some high-end brands, TrailFX skid plates are **not highly customizable**. If an owner wants **unique modifications** (e.g., reinforced areas, additional cutouts), they may need to weld or modify the plate themselves.
3. **Potential for Rust Over Time** While **19-gauge steel is durable**, it is not **rust-proof**. In **salted roads, off-road environments, or coastal areas**, the skid plate may require **additional rust protection** (e.g., **powder coating, wax, or corrosion inhibitors**) to extend its lifespan.
4. **Installation May Require Some Tools** While easier than welding a custom plate, installation still requires **basic tools (socket set, torque wrench, possibly a jack and stands)**. Those without mechanical experience may find it **challenging but manageable**.
5. **Not a Lift Kit Replacement** The STF 21 is **not a lift kit** it only provides skid protection. If an owner wants **higher ground clearance**, they would need to pair it with a **lift kit (e.g., Fox, Bilstein, or Mega-Lift)**.
6. **Weight Consideration (Minor)** While lightweight compared to full armor, the skid plate **adds some weight** to the undercarriage. However, the difference is negligible compared to the benefits.
7. **Resale Impact** Some buyers may **prefer factory steel** for simplicity, and a skid plate installation could **deter resale value** for those who prioritize stock appearance. However, this is subjective and depends on the buyer s preferences.
---
### **Conclusion**
The **TrailFX TFX3319 STF 21 is an excellent choice** for F-150 owners who want **reliable, affordable, and easy-to-install skid protection** without compromising on durability. It strikes a **strong balance between cost, performance, and ease of use**, making it ideal for **daily drivers who occasionally off-road, towing enthusiasts, and light off-roaders**.
However, it is **not a complete off-road armor solution** those pushing their F-150 to extreme limits (e.g., rock crawling, deep mud) may need **additional protection**. Additionally, **rust prevention** should be considered for long-term durability in harsh conditions.
---
### **Final Recommendation**
**Buy the TrailFX TFX3319 STF 21 if:**You want **affordable, high-quality skid protection** for your F-150.
You frequently drive on **rough roads, trails, or tow heavy loads** and want to prevent undercarriage damage.
You prefer a **straightforward installation** without extensive welding or modifications.
You prioritize **durability and fuel efficiency** over full armor.
**Consider alternatives (e.g., Fabtech, ARB, or custom welding) if:**You need **full undercarriage protection** (e.g., for extreme off-roading).
You want **custom modifications** (e.g., reinforced areas, unique cutouts).
You live in a **high-corrosion environment** and want **maximum rust resistance**.
**Overall Verdict:** The **TFX3319 STF 21 is a smart, cost-effective upgrade** for most F-150 owners looking to enhance protection without overcomplicating their build. It s a **reliable, well-supported product** from a trusted brand, making it a **highly recommended purchase** for its intended use.
For kits, photo might show entire kit and listing is only for one component. TrailFX Soft Folding Tonnes offer a lightweight, yet durable solution to fulfill your transporting needs. If you're transporting or storing cargo in your bed, these affordable covers install easily and keep safe secure. Note: Photos do not always represent the actual product.
This weather tight tonneau offers instant access to your truck bed. STF 21 F150 5'5',: : Soft Teri-Fold; Lockable Using Tailgate Handle Lock; Black Vinyl With Aluminum Rails.