Front Suspension Parts for a 2007 Mustang GT CS – A Complete Guide

If you own a 2007 Mustang GT CS (California Special), you know it combines classic muscle car looks with modern performance. Over time, front suspension components wear out or you may want to upgrade for better handling. This guide covers the essential front suspension parts for a 2007 Mustang GT CS, what they do, when to replace them, and how to choose the right ones. Whether you're restoring your CS or improving its cornering, this information will help you make informed decisions.

Key Front Suspension Components

The front suspension of the 2007 Mustang GT CS is a MacPherson strut design with a lower control arm, stabilizer bar, and various bushings and ball joints. Here's a breakdown of the main parts:

Struts and Shocks

Front struts are a critical component because they combine the shock absorber and coil spring into a single assembly. On the GT CS, the factory struts are tuned for a balance of comfort and performance. Replacing worn struts restores ride quality and handling. If you want improved damping and adjustability, aftermarket options from brands like Koni, Bilstein, or KYB are popular. Consider whether you need a complete strut assembly (with spring) or just the strut cartridge. Complete assemblies are easier to install, while separate struts allow you to reuse or upgrade springs.

Lower Control Arms

The lower control arm connects the steering knuckle to the frame and allows vertical wheel movement. It contains bushings and a ball joint. Worn control arms can cause clunking noises, uneven tire wear, and vague steering. For the 2007 Mustang GT CS, you can replace just the bushings and ball joints if the arm itself is in good shape, but many choose complete control arms for convenience. Polyurethane bushings offer more precise handling than rubber, but they transmit more vibration. For a daily driver, rubber or upgraded rubber is often best.

Upper Control Arms? – Note: The 2007 Mustang front suspension does not have an upper control arm. It uses a lower control arm and two upper strut mounts (the top of the strut attaches to the chassis). What some call "upper control arms" in other vehicles are not present here. Be careful when searching for parts: you need front lower control arms for the 2007 Mustang.

Stabilizer Bar (Sway Bar)

The front stabilizer bar reduces body roll during cornering. The GT CS came with a specific hollow sway bar diameter (typically 34mm). Upgrading to a larger aftermarket bar (e.g., 35mm or 36mm solid) further reduces roll and improves turn-in response. Pair it with polyurethane bushings and end links for maximum benefit. End links connect the sway bar to the strut or control arm; replacing worn end links eliminates clunks.

Ball Joints and Tie Rods

Ball joints are part of the lower control arm (on this Mustang, they are integral to the arm). Outer tie rod ends connect the steering rack to the steering knuckle. Worn tie rod ends cause steering play and uneven tire wear. Always replace them in pairs. For a GT CS, stock replacements are fine, but some choose heavy-duty units for track use.

Springs

Factory springs on the GT CS provide a moderate ride height and rate. If you lower the car for aesthetics or handling, coil springs with a lower free height and higher spring rate are available from brands like Eibach, H&R, or Ford Performance. Lowering too much can affect alignment and ride comfort; 1–1.5 inches is common. Consider coilover kits if you want adjustable ride height and damping.

Strut Mounts and Bearings

The strut mounts at the top of the car include a bearing that allows the strut to rotate as you steer. Worn mounts can cause creaking noises and misalignment. When replacing struts, it's wise to replace the mounts and bearings simultaneously. Upgraded mounts with firmer rubber or camber adjustment plates are available for those who need alignment adjustments after lowering.

Signs Your Front Suspension Needs Attention

• Clunking or knocking sounds when going over bumps or turning.
• Excessive body roll in corners.
• Drifting or wandering on the highway.
• Uneven tire wear (feathering or cupping).
• Steering wheel vibration or looseness.
• Front end sagging (lower ride height on one side).

If you notice any of these, inspect the front suspension thoroughly. Pay special attention to strut boots, bushings, and ball joints.

Choosing the Right Parts

OEM vs. Aftermarket

OEM (Ford) parts are identical to what came from the factory. They offer predictable performance and longevity. Aftermarket parts may offer improved durability, adjustability, or performance. For a daily-driven GT CS, quality OEM or OEM-equivalent parts (like Motorcraft) are a safe choice. For autocross or track days, consider upgraded aftermarket parts.

Material and Bushings

Rubber bushings are quiet and comfortable; polyurethane is stiffer and longer-lasting but may squeak. If you use polyurethane, apply grease during installation and expect some noise. For street use, choose a compromise.

Brand Recommendations

• Struts/Shocks: Bilstein (B6 or B8), Koni (Orange or Yellow), KYB (Excel-G or Gas-A-Just).
• Lower Control Arms: Ford Performance (for upgraded tension), Moog (quality OEM replacement), or Energy Suspension (bushings only).
• Sway Bars: Eibach, H&R, or Steeda.
• Springs: Eibach Pro-Kit, H&R Sport, Ford Performance.
• Tie Rods: Moog or Ford.

Compatibility Note

Always confirm part fitment for the 2007 Mustang GT CS. The CS is essentially a GT with appearance package, so front suspension is identical to a standard GT. However, cars with adjustable suspension (if any) or differing options may vary. Check your VIN or consult a parts supplier.

Installation Considerations

Replacing front suspension parts on this Mustang requires common tools like jack stands, wrenches, sockets, a ball joint separator, and a spring compressor (if not using complete strut assemblies). Alignments are mandatory after replacing any steering or suspension components. Expect 2–4 hours of labor per side for DIY install with moderate experience. If you're not comfortable, have a professional do it.

Recommended Replacement Order

1. Struts and mounts (if needed)
2. Lower control arms (or bushings/ball joints)
3. Tie rods
4. Sway bar bushings and end links
5. Springs (if changing ride height)

Work one side at a time, and pay attention to torque specifications. Use anti-seize on bolts exposed to weather.

Final Recommendation

For a 2007 Mustang GT CS used primarily as a daily driver, we recommend replacing worn parts with OEM-quality components from brands like Motorcraft or Moog. If you want improved handling without sacrificing comfort, a set of Bilstein B6 struts with new mounts, plus Moog lower control arms and sway bar bushings, will tighten up the front end noticeably. For those who lower the car, pair Eibach Pro-Kit springs with Bilstein B8 struts. Always get a professional alignment after any suspension work.

This approach keeps the car reliable, safe, and enjoyable without overspending on unnecessary upgrades. Focus on what's worn first, and only upgrade if your driving demands it.