The Ultimate Guide to MK3 Supra Suspension Parts: Upgrades, Maintenance, and Buying Tips

If you own a Toyota Supra MK3 (A70), you know its suspension is a key part of the driving experience. Whether you're looking to restore a classic, improve handling for spirited driving, or build a track weapon, understanding MK3 Supra suspension parts is essential. This guide covers the most common components, upgrade options, and factors to consider when maintaining or modifying your Supra's suspension.

Why Upgrade or Replace Suspension Parts?

Over time, factory suspension components wear out. Bushings crack, shocks leak, and springs sag. Upgrading can transform the car's feel, reducing body roll, improving steering response, and giving you a more planted ride. For the MK3 Supra, which originally had a compliant but somewhat floaty suspension, aftermarket parts can dramatically sharpen handling without sacrificing daily drivability.

Key Suspension Components for the MK3 Supra

Coilovers

Coilovers replace the factory strut and spring assembly with a height-adjustable unit. They are the most popular suspension upgrade for the MK3 Supra because they allow fine-tuning of ride height, damping, and sometimes spring rate. Options range from budget-friendly sets to high-end, fully adjustable coilovers from brands like KW, Tein, BC Racing, and HKS.

• Street-oriented coilovers offer a balance between comfort and performance. They typically have softer spring rates and less aggressive damping.
• Track-focused coilovers are stiffer, with damping adjustability and higher spring rates. They transfer more road feedback but can be harsh on rough pavement.
• Air suspension is an option for those who want adjustability and a smooth ride, but it adds weight and complexity.

When selecting coilovers, consider your driving goals. If the car is a daily driver, a coilover set with linear springs and adjustable damping in the 30-click range works well. For autocross or track use, look for units with separate rebound and compression adjustment.

Springs and Struts

Not everyone wants coilovers. A spring-and-strut combo can be a more affordable upgrade that still transforms handling. Lowering springs (usually 1-1.5 inch drops) paired with performance struts like Koni Yellow or Bilstein are a classic combo. The MK3 Supra uses a MacPherson strut front and a semi-trailing arm rear, so proper damping is critical.

• Progressive springs offer a smooth initial ride but stiffen under compression. Good for daily driving.
• Linear springs have a constant rate, providing predictable handling. Better for performance.

Match your spring choice to struts valved for that spring rate. Mismatched parts can lead to poor ride quality or premature failure.

Sway Bars

Sway bars (anti-roll bars) reduce body lean in corners. The MK3 Supra comes with modestly sized front and rear bars. Upgrading to thicker bars (22mm-25mm front, 18mm-22mm rear) significantly reduces body roll without affecting ride quality as much as stiffer springs. Most aftermarket sway bars are adjustable, allowing you to fine-tune understeer/oversteer balance.

Installing larger sway bars also necessitates upgrading the bushings to polyurethane ones to prevent deflection and maintain bar effectiveness.

Bushings

The MK3 Supra has numerous rubber bushings in the control arms, sway bar links, subframe, and differential. Old, cracked rubber bushings cause sloppy handling and vague steering. Replacing them with polyurethane or solid bushings tightens the chassis, giving you precise inputs. However, polyurethane is stiffer and transmits more road noise and vibration.

Common bushing upgrades:

• Front lower control arm bushings – affect caster and front grip.
• Rear trailing arm bushings – crucial for toe stability.
• Subframe bushings – reduce rear-end flex.

For a street car, polyurethane is a good compromise. For track use, spherical bearings (rod ends) are the ultimate choice, but they are harsh for daily driving.

Tie Rods and Steering Components

Worn tie rod ends cause sloppy steering. The MK3 Supra uses inner and outer tie rods. Aftermarket options include adjustable tie rods, which allow for fine-tuning toe settings beyond factory range. This is especially useful if you have lowered the car significantly, as geometry changes can lead to increased bump steer.

Control Arms

Stock control arms have non-adjustable ball joints and bushings. Aftermarket control arms offer adjustability for camber and caster, which is essential for lowered cars to get proper alignment. Brands like Megan Racing, SPC, and GKTech offer adjustable upper and lower arms for the MK3 Supra.

• Front upper control arms with adjustable ball joints allow camber adjustments without slotting the strut tower.
• Rear camber arms correct the negative camber that occurs when lowering the car.
• Toe arms (or toe rods) let you set rear toe precisely.

If your MK3 Supra is lowered more than 1.5 inches, adjustable arms are highly recommended to avoid uneven tire wear and maintain handling balance.

Brake and Wheel Considerations

While not suspension parts per se, upgraded brakes and wider wheels significantly affect handling. The MK3 Supra benefits from a big brake kit (BBK) using calipers from later Supras or aftermarket kits. Combined with a high-performance wheel and tire setup (e.g., 17x8 front, 17x9 rear), you can fully utilize the suspension upgrades.

Maintenance Tips

• Inspect ball joints and tie rod ends for play. Replace if boot is torn or movement is excessive.
• Check shock absorbers for leaks. A single leaking shock compromises handling.
• Lubricate polyurethane bushings periodically to prevent squeaking.
• After any suspension work, get a proper alignment with corner balance if possible.

Choosing Between OEM and Aftermarket

For a restoration, OEM parts (from Toyota or NAPA) are perfect for a stock ride. For performance use, aftermarket parts offer better adjustability and durability. However, not all aftermarket parts are equal: cheap coilovers may have poor valving and short lifespans. Stick with reputable brands that have a proven track record with the MK3 Supra community.

Final Recommendation

Your ideal setup depends on budget and goals.

• Budget daily driver: Lowering springs with Koni Orange or Bilstein B6 struts. Add a thicker rear sway bar.
• Spirited street driving: Mid-range coilovers (BC Racing, Tein Flex Z) with adjustable camber arms in the rear.
• Track/autocross: Premium coilovers (KW V3 or JRZ), full polyurethane bushing set, adjustable control arms, and upgraded sway bars.

Whichever route you take, buy from trusted sources and consider a complete overhaul if your MK3 Supra's suspension is original. The difference in feel and confidence will make every drive more enjoyable.