Upgrading the suspension on your Ford Focus ST is one of the most effective ways to improve handling, reduce body roll, and sharpen turn-in response. Whether you are looking to lower the car for a more aggressive stance or enhance performance on back roads and track days, CJ Pony Parts offers a wide selection of quality suspension components. This guide covers the installation process for common Focus ST suspension upgrades, including coilovers, lowering springs, and strut assemblies. We will walk through the necessary tools, step-by-step procedures, and key considerations to ensure a successful install.
Understanding Focus ST Suspension Options
Before diving into the installation, it helps to understand the main types of suspension upgrades available for the Focus ST. Your choice will affect ride quality, adjustability, and installation complexity.
Coilovers vs. Springs and Struts
Coilovers combine a spring and shock absorber into a single unit, often with adjustable ride height and damping. They are ideal for drivers who want fine-tuned control over the car’s stance and handling. On the other hand, lowering springs paired with performance struts are a simpler and more affordable route. They lower the car and improve stiffness but lack the adjustability of coilovers.
Key Brands Available at CJ Pony Parts
CJ Pony Parts stocks reputable brands such as Ford Performance, Eibach, H&R, Bilstein, and Koni. Each offers distinct characteristics. Ford Performance parts are designed to work with the stock calibration and provide a balanced upgrade. Eibach springs offer progressive rates for daily driving comfort with improved handling. Bilstein and Koni are known for high-quality dampers that deliver consistent performance. Be sure to verify that the parts are compatible with your model year (typically 2013–2018).
Tools and Preparation for Installation
A proper installation requires the right tools and a safe work environment. Rushing this step can lead to stripped bolts or damaged components.
Essential Tools
- Floor jack and jack stands (4 stands recommended)
- Torque wrench (ft-lb and in-lb ranges)
- Metric socket set with extensions (10mm, 13mm, 15mm, 18mm, 21mm)
- Breaker bar or impact wrench
- Spring compressors (for strut and spring assemblies)
- Allen keys (for camber bolts if equipped)
- Pry bar and rubber mallet
- Penetrating oil (e.g., PB Blaster)
- Wire brush
- Thread locker (Loctite blue)
Safety Precautions
- Work on a level surface.
- Use jack stands – never rely solely on a floor jack.
- Wear safety glasses and gloves.
- Disconnect the battery negative terminal if working near electronic sensors.
- If using spring compressors, follow the manufacturer’s instructions carefully to avoid injury.
Step-by-Step Install Guide
This guide assumes you have removed the wheel and have a clear workspace. The process is similar for most suspension swaps, but always refer to the specific instructions provided with your parts.
Front Suspension Removal
- Pry off the lower strut nut cover (if equipped) and spray penetrating oil on the lower strut bolts, sway bar end link nuts, and upper strut mount bolts.
- Remove the sway bar end link nut and disconnect the link from the strut. You may need to hold the stud with an Allen key.
- Remove the two lower strut bolts (18mm or 21mm) securing the strut to the knuckle.
- Support the hub assembly with a jack or jack stand to prevent CV joint damage.
- Inside the engine bay, remove the three upper strut mount nuts (13mm). Use a breaker bar if they are stubborn.
- Gently lower the strut assembly out of the wheel well. Be careful not to damage the CV boot or brake lines.
Front Suspension Installation
- Assemble the new strut or coilover. If using springs, compress the old spring and transfer it to the new strut with the supplied hardware. Apply thread locker to the top nut.
- Insert the new assembly into the upper mounting hole. Align the three studs and tighten the nuts by hand.
- Guide the lower part of the strut into the knuckle. Install the lower bolts and torque to spec (typically 85–95 ft-lb).
- Reattach the sway bar end link. Use new nuts if provided. Torque to 35–45 ft-lb.
- Torque the upper mount nuts to 30–40 ft-lb.
- Repeat on the other side.
Rear Suspension Removal
- The rear uses a separate spring and shock design. Remove the lower shock bolt (18mm) and the upper shock mount nut (13mm) from inside the cargo area.
- Compress the rear spring using spring compressors. Note: some kits reuse the stock spring perch – check instructions.
- Remove the spring and replace with the new spring or coilover.
- Install the new shock absorber. Torque the lower bolt to 40–50 ft-lb and the upper nut to 20–30 ft-lb.
Rear Suspension Installation
- Follow removal steps in reverse. Ensure the spring is seated properly in its perches.
- If installing camber arms or adjustable toe links, adjust them to factory specs before tightening.
- Reinstall wheels and lower the car to the ground before torquing lug nuts (90–100 ft-lb).
Alignment and Post-Install Checks
After installing new suspension components, the alignment will be off. It is essential to drive the car carefully to a professional alignment shop. Have them set the camber, caster, and toe to factory specifications or your desired performance settings. Also, retorque all suspension bolts after 100–200 miles to account for settling.
Final Recommendation: Choosing the Right Setup for Your Focus ST
For most Focus ST owners, a good starting point is a set of quality lowering springs paired with upgraded shocks or struts. This provides noticeable handling improvements without the complexity of adjustable coilovers. Brands like Eibach Pro-Kit with Bilstein B6 dampers offer a proven combination. If you plan to track the car or want a show-ready stance, invest in a full coilover setup from brands like KW or BC Racing, available through CJ Pony Parts. No matter which route you choose, follow the installation steps carefully and prioritize a proper alignment for maximum performance and tire longevity.