Upgrading the suspension on a 2016 Ford Mustang GT is one of the most effective ways to improve handling, reduce body roll, and sharpen the car’s overall driving dynamics. CJ Pony Parts offers a full range of suspension components specifically designed for the S550 platform, including coilovers, lowering springs, sway bars, and control arms. Whether you are installing a complete kit or just replacing a few parts, following the proper procedure is essential for safety and performance. This guide covers the step-by-step installation of a typical CJ Pony Parts suspension upgrade on a 2016 Mustang GT, including front and rear components. The instructions assume you have basic mechanical experience and a safe workspace.
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Preparation and Safety
Before starting any suspension work, park the Mustang on a level surface and secure it with wheel chocks. Disconnect the battery negative terminal to prevent accidental airbag deployment if your car is equipped. Work on one corner at a time and support the vehicle with jack stands rated for at least 3 tons. Never rely on a hydraulic jack alone. Allow the car to cool completely, as exhaust and brake components can be hot. Wear safety glasses and gloves, and have a fire extinguisher nearby. Read the instruction manual that comes with your CJ Pony Parts kit thoroughly; it may contain model-specific notes.
Tools and Parts Required
Tools
- Jack and jack stands
- Floor jack (low-profile recommended)
- Metric socket set (10mm, 13mm, 15mm, 18mm, 21mm)
- Torx bits (T50 for some sway bar links)
- Torque wrench (0–250 ft-lb range)
- Spring compressor (for coil spring removal)
- Pry bar or pickle fork
- Ball joint separator
- Breaker bar
- Hammer
- Allen keys (for adjustable coilovers)
- Penetrating oil (like PB Blaster)
- Thread locker (blue Loctite)
- Anti-seize compound
CJ Pony Parts Suspension Kit Example
- Front coilover assembly (or lowering springs and shocks)
- Rear coilover assembly (or lowering springs and shocks)
- Adjustable sway bars (front and rear, if included)
- Sway bar end links
- Camber bolts (if needed)
- Control arms (optional)
- Bushing inserts or polyurethane bushings
Front Suspension Installation
Step 1: Remove the Front Wheel and Brake Caliper
Loosen the lug nuts while the wheel is on the ground. Jack up the front and place a jack stand under the frame rail. Remove the wheel. For easier access, remove the brake caliper and rotor. Hang the caliper with a zip tie to avoid stressing the brake line.
Step 2: Disconnect the Sway Bar End Link and Tie Rod
Spray penetrating oil on all fasteners. Remove the sway bar end link from the strut housing using a T50 Torx bit or a 15mm socket. Then, separate the outer tie rod end from the knuckle using a ball joint separator. Count the number of exposed threads on the tie rod to simplify alignment later.
Step 3: Remove the Strut Assembly
Remove the two bolts that secure the strut to the knuckle (usually 18mm). Support the lower control arm with a jack, then remove the three nuts on top of the strut tower. Carefully lower the strut assembly out of the car. If you are reusing the spring, use a spring compressor before disassembling the strut.
Step 4: Install the New CJ Pony Parts Strut or Coilover
If you purchased a complete coilover, it comes preassembled and ready to install. For a spring and shock combo, compress the new spring and assemble it with the new shock and mounts. Apply anti-seize to the top mount threads. Lift the assembly into the strut tower, aligning the top studs. Install the top nuts loosely. Then, attach the bottom of the strut to the knuckle. Torque the knuckle bolts to 90 ft-lb (check kit specs). Torque the top nuts to 30 ft-lb. Reattach the tie rod end and sway bar end link.
Step 5: Repeat on the Other Side
Complete the same procedure on the passenger side. Once both front assemblies are installed, torque the sway bar end links and tie rods to manufacturer specs.
Rear Suspension Installation
Step 1: Remove the Rear Wheel and Brake Components
Jack up the rear and place jack stands under the axle or subframe. Remove the wheel, brake caliper, and rotor. Support the lower control arm with a jack to prevent the spring from dropping out.
Step 2: Disconnect the Sway Bar and End Links
Unbolt the rear sway bar from the chassis and end links. On the S550, the rear sway bar is mounted to the subframe. Remove the end links from the control arm.
Step 3: Remove the Spring and Shock Assembly
On the 2016 Mustang GT, the rear spring is separate from the shock (unless you have a coilover). If you are installing a coilover, the spring and shock are combined. For a separate spring, slowly lower the control arm to release spring tension. Remove the spring. Then unbolt the lower shock mount (usually a 15mm bolt) and the top mount (two 13mm bolts inside the trunk). Remove the shock.
Step 4: Install the Rear Coilover or Spring/Shock
For a coilover, adjust the ride height per the kit instructions before installation. Insert the coilover assembly, aligning the lower mount with the control arm and the top mount with the chassis. Hand-tighten all bolts. For a traditional setup, compress the new spring and place it in the pocket, then raise the control arm with a jack to seat it. Install the new shock, tightening the top mount to 25 ft-lb and the lower mount to 55 ft-lb. Reattach the sway bar and end links.
Step 5: Repeat on the Other Side
Mirror the procedure for the driver side rear. Ensure all fasteners are torqued and that no components are binding.
Final Checks and Initial Setup
After both axles are complete, install the wheels and lower the car to the ground. Do not torque the lug nuts until the car is on the ground. With the vehicle weight resting on the suspension, bounce the car a few times to settle the springs. Then torque the lug nuts to 150 ft-lb (or the CT required spec).
For adjustable coilovers, set the dampening to a medium setting (e.g., 12 clicks from full soft) for initial testing. If your kit includes adjustable sway bars, start with the softest hole for street driving. Check all bolts and nuts one more time. Check brake lines and ABS wires for proper clearance. Ensure there is no rubbing when turning the steering wheel full lock.
Driving and Alignment
Drive the car gently for a few miles to allow the suspension to settle. Listen for any clunks or rattles. Afterward, return to the shop and re-torque all bolts (especially the top mounts and control arm bolts) because new bushings may compress. Schedule a professional alignment immediately. A proper alignment is critical after any suspension change to ensure tire wear and handling. Expect to pay $80–$150 for a four-wheel alignment. Adjust camber, caster, and toe to the specifications recommended by the suspension manufacturer.
Recommended Practices
- Work on a clean, dry floor. Dirt and debris can damage new bushings.
- Label all removed parts if you are storing them.
- Take photos before disassembly for reference.
- If you are installing lowering springs, consider performance shocks to match.
- Use a torque wrench on all critical fasteners – suspension components are safety items.
- If you are not comfortable with spring compressors, have a shop install the springs on the struts.
- After installation, check the headlight aim – it may need adjustment after lowering.
Final Recommendation
A CJ Pony Parts suspension upgrade for the 2016 Mustang GT can transform the car’s handling. The kit typically includes well-engineered components that are direct-fit and require minimal modification. However, the installation requires patience, the right tools, and attention to detail. If you have never done suspension work before, consider having a professional perform the installation or assist you. For experienced DIYers, this is a satisfying weekend project that yields noticeable improvements in cornering and ride quality. Always follow the torque specifications and instructions provided with your specific CJ Pony Parts kit. With proper installation and alignment, your Mustang will feel more planted and responsive on the road or track.