When it comes to removing a sway bar link or installing a new control arm on your 2006 Kia Spectra SX, there are a few steps and techniques you can follow to successfully complete the task. Here's a guide to help you out:

Removing the Sway Bar Link:
1. Start by securely supporting the vehicle on jack stands and ensure the wheels are off the ground.
2. Locate the sway bar link, which is connected to the sway bar and the control arm.
3. Use a penetrating oil, such as WD-40, to spray the sway bar link nut and bolt joint. Allow it to sit for a few minutes to loosen any rust or debris.
4. Use an appropriate-sized wrench or socket to hold the sway bar link bolt securely, while using another wrench or socket to loosen and remove the nut from the other end. If the nut is too rusted or difficult to remove, you may need to apply more penetrating oil, or use a breaker bar for extra leverage.
5. Once the nut is removed, you can use a hammer or a pry bar to separate the sway bar link from the sway bar or control arm. Be careful not to damage any surrounding components.

Installing the Control Arm:
1. Start by ensuring the replacement control arm is correct for your vehicle's make, model, and year.
2. With the vehicle still supported on jack stands, align the new control arm with the mounting points on the chassis and the suspension components.
3. Insert the control arm bolts through the appropriate holes in the mounting brackets.
4. Apply a small amount of anti-seize compound to the control arm bolts to prevent rust and make future removal easier.
5. Start threading the control arm bolts by hand until they are snug, ensuring proper alignment.
6. Use a torque wrench to tighten the control arm bolts to the manufacturer's specified torque setting. It is crucial to follow the recommended torque to ensure proper suspension function and prevent damage.
7. Repeat the process for all control arms that need replacement, if applicable.

If you are experiencing difficulties during any step or encounter any unexpected issues, it may be best to consult a professional mechanic or refer to the vehicle's service manual for further guidance.