Celica GT4 Suspension Parts: The Complete Guide to Upgrades and Maintenance

The Toyota Celica GT4 (also known as the All-Trac in the US) is a performance icon from the 1990s, celebrated for its turbocharged all-wheel-drive system. To keep its handling sharp or to upgrade for track days or spirited driving, suspension parts play a crucial role. This guide covers the key suspension components for the Celica GT4, what they do, and how to choose the right parts for your driving needs. Whether you're restoring a stock car or building a dedicated track machine, understanding the suspension system is essential.

Why Upgrade the Celica GT4 Suspension?

The original GT4 suspension was designed for a balance of comfort and performance. Over time, shocks wear out, bushings dry up, and the car may feel loose or bouncy. Upgrading suspension parts can restore handling, reduce body roll, improve grip, and sharpen turn-in response. Common goals include lowering the ride height for a more aggressive stance, increasing spring rates for track use, and replacing worn bushings for precise control.

Key Suspension Components for Celica GT4

Coilovers vs. Strut-and-Spring Kits

One of the first decisions is whether to install full coilovers or keep a separate strut-and-spring setup. Coilovers combine the shock absorber and spring in a single unit with adjustable ride height and often damping. They are a popular choice for enthusiasts because they allow fine-tuning of corner balance and lowering amount. Quality coilovers for the GT4 include brands like BC Racing, Tein, and KW, each offering different levels of adjustability.

Strut-and-spring kits (like performance springs paired with upgraded shocks) are simpler and less expensive. They can lower the car and improve handling, but they lack the adjustment range of coilovers. If you mainly drive on the street and want a modest drop, a spring/shock kit may be sufficient. For track use, coilovers provide the adjustability needed to dial in the suspension.

Sway Bars (Anti-Roll Bars)

Sway bars reduce body roll during cornering by connecting the left and right suspension. Upgrading to thicker sway bars can dramatically improve flat cornering and reduce understeer, a common trait in AWD cars. For the Celica GT4, aftermarket sway bars from Eibach, Whiteline, or Cusco are common. A thicker rear bar can help rotate the car in corners. However, too thick a bar can make the ride harsh; a balance is key.

Control Arms and Bushings

The GT4 uses several control arms in the front and rear multi-link suspension. Stock bushings are rubber and deteriorate with age, leading to sloppy handling. Upgrading to polyurethane or solid bushings in the lower control arms, trailing arms, and rear knuckle links can restore precision. Polyurethane bushings offer a good compromise between stiffness and reasonable road noise. Solid bushings are for racing only.

Adjustable control arms allow correction of alignment angles after lowering. The rear camber and toe can be significantly affected by lowering, so adjustable rear arms are often necessary to maintain proper tire wear and handling.

Strut Tower Braces

A strut tower brace connects the tops of the front suspension struts, reducing chassis flex during cornering. This is a simple bolt-on that improves steering feel and front-end rigidity. For the GT4, front strut braces are widely available from Cusco, TRD, or Megan Racing. Rear strut braces can also help but may intrude on cargo space.

Springs: Lowering vs. Stock Height

If you choose separate springs, consider the spring rate and drop. A moderate drop of 1.0–1.5 inches is common for street use. Higher spring rates increase cornering grip but make the ride stiffer. Progressive rate springs offer a compromise: soft over bumps but stiff in corners. Linear springs are consistent and preferred for track use. Brands like Eibach, H&R, and Tein S-Tech are popular.

Shocks and Struts

Stock shocks/struts typically last 50,000–80,000 miles. Performance replacements like Koni Yellow or Bilstein offer adjustable damping and better heat dissipation. Pair them with matching springs for best results. For coilover crowd, the integrated shock is already matched to the spring.

Choosing the Right Parts for Your Celica GT4

Street vs. Track

For street driving, prioritize comfort and reliability. A set of quality coilovers with adjustable damping (e.g., BC Racing BR series) allows you to soften for daily driving and stiffen for weekend fun. Alternatively, a shock/spring kit from Koni or Bilstein with Eibach springs works well. If you track your GT4 often, higher spring rates (8-10 kg/mm front, 6-8 rear) and polyurethane bushings are beneficial. Consider adding adjustable sway bars and camber plates.

Budget Considerations

Suspension parts range from budget to premium. Avoid the cheapest coilovers, as they often have poor damping and short lifespan. Mid-range options like BC Racing, Tein Street Basis, or Koni Yellows with Eibach springs offer good value. Top-tier brands like KW V3 or Ohlins provide superior performance but cost significantly more. Set a realistic budget based on how you use the car.

Compatibility and Fitment

The Celica GT4 (ST205 generation) has unique suspension geometry compared to other Celicas. Ensure parts are specifically listed for the GT4 or All-Trac. Coilovers designed for front-wheel-drive Celicas may not fit the AWD drivetrain. Check forums and vendor fitment guides. Also consider wheel size: if you lower the car, you may need smaller offset or rolled fenders to avoid rubbing.

Common Suspension Upgrades for the Celica GT4

Front Coilover Install

Replacing front struts with coilovers requires removing the strut assembly, compressing the spring (if using separate), and transferring the top mount. For coilovers, they come as a unit. A strut tower brace installation is straightforward.

Rear Shock Replacement

The rear shocks are easy to access inside the cargo area. They require removing the interior trim. Adding adjustable rear sway bar links can fine-tune the bar’s effect.

Subframe Bushings

The front subframe and rear crossmember have large rubber bushings that contribute to wheel hop under hard acceleration. Upgrading to polyurethane or solid aluminum bushings reduces drivetrain movement and improves traction. This is a more involved job requiring subframe removal.

Maintenance Tips

• Regularly check bolts and fasteners after installation.
• Grease polyurethane bushings to prevent squeaks.
• Adjust damping settings based on driving conditions.
• Re-torque all suspension bolts after a few hundred miles.
• Get a professional alignment after lowering.

Final Recommendations

For most Celica GT4 owners, a balanced upgrade path is:

1. Replace worn shocks/struts with adjustable coilovers (BC Racing BR or similar).
2. Install a front strut tower brace for improved steering.
3. Upgrade the rear sway bar to a 22mm or 24mm bar.
4. Replace front control arm bushings with polyurethane.
5. Add adjustable rear camber arms if lowering more than 1 inch.

This setup transforms the car’s handling without breaking the bank or sacrificing daily comfort. If your car is a track-only machine, consider stiffer springs, solid bushings, and a full set of adjustable arms.

Always verify part compatibility with your specific year and model. The Celica GT4 is a rewarding car to drive, and the right suspension parts will make it even better.