Table of contents
In this suspension tuning guide, we'll explain how to unlock more handling performance from the Porsche 986/987 Boxster. We’ll cover the standard car’s handling flaws and reveal the best ways to fix them using Suspension Secrets upgrades.
986/987 Boxster Overview
The 986 Boxster (1996-2004) and 987 generation (2004-2012) are closely related under the skin. Both soft-top Porsches use essentially the same chassis and suspension components, with MacPherson struts at all four corners.
The 986 and 987 Boxsters share most of their basic rear suspension parts, including the coffin arms and hubs. The front upper strut mounts and bearings are also the same. This means aftermarket suspension upgrades applicable to the 986 Boxster also work very well on the 987 generation car.
Read on to find out which Boxster suspension upgrades make the biggest difference to handling performance on the road and track.
Suspension & Handling Problems (And How to Fix Them)
The early generations of Porsche Boxster were pitched as sports cars, but by today's standards feel relatively soft and imprecise. These characteristics are even more pronounced on track.
Main 986/987 Problems
- Noticeable body roll during fast driving
- Vague front end on turn-in
- Rear instability caused by worn suspension parts
- Significant diving/squatting under hard braking/acceleration
These issues hold back the 986 and 987 Boxster, but leave a great opportunity for suspension upgrades to deliver significant handling performance gains.
The most effective fixes involve:
- Adjusting toe angle to enhance traction and stability
- Replacing rubber bushes with solid bushes to increase precision
- Fitting uprated springs and dampers to improve body control
- Correcting suspension geometry with a professional alignment
With these suspension changes implemented, the 986 and 987 Boxster will feel much more responsive and engaging, with handling greatly improved on the road and track.
Suspension Geometry & Alignment Setup (Top Tip)
A full suspension geometry alignment is essential after installing new suspension parts. By correctly adjusting camber, toe, and caster (where available), alignment ensures you maximise grip, stability, and tyre life.
Benefits of a Professional Boxster Geometry Setup
- Sharper steering response
- Increased cornering grip
- Improved rear traction
- Enhanced braking stability
- More consistent tyre wear
A professional alignment is the single most cost-effective handling upgrade you can make.
Essential Suspension Upgrades for 986/987 Boxster
Below are the best suspension upgrades you can make to the Porsche 986 and 987 Boxster. These aftermarket parts will reduce understeer, enhance cornering grip, improve rear traction and dramatically reduce hesitation in the car's responses.
Adjustable Rear Toe Arms
Although the factory toe arms can be adjusted, their range is limited and compromises overall setup, especially as more negative camber is applied. As rear camber is increased to improve cornering grip, it becomes impossible to achieve the toe-in necessary for enhanced corner-exit stability and traction.
Suspension Secrets Adjustable Rear Toe Arms offer:
- Greater adjustment range than OEM arms
- Independent optimisation of camber and toe
- Solid mounting to eliminate flex under load
- Increased cornering stability
Unlike the rubber‑bushed factory arms, our rose-jointed toe arms maintain consistent geometry during acceleration and high-speed cornering.
Solid Suspension Bushes
The Porsche 986 and 987 Boxster boast stiffer springs, revised damping and more aggressive alignment settings than regular xxxx. However, they still use rubber control arm bushes. These flex during high speed driving, and thanks to age may be softer than originally intended, which makes flexing even more pronounced. This situation negatively impacts steering feel and response, plus overall stability including when braking hard.
Replacing the rubber bushes with solid bushes stops this unwanted movement, increasing braking consistency and steering precision. Solid bushes ensure proper camber and toe angle control, which keeps the tyres working more consistently across the contact patch.
Solid Bushes Benefits:
- Sharper and more accurate steering
- Improved braking stability
- More consistent suspension geometry
- Increased chassis rigidity
The small increase in NVH is offset by the dramatically improved feedback and response offered by our Front and Rear Solid Control Arm Bush Inserts, and Lower Control Arm Inner Monoballs.
Adjustable Bump-Steer Tie Rod Ends
Suspension geometry and steering kinematics play a significant role in how the 986 and 987 Boxster behave at high speed. We often see these cars lowered and/or fitted with aftermarket coilovers for track driving, however this upgrade is known to create bump-steer.
Bump-steer is caused by the front toe angle changing as the suspension moves through its travel. This leads to a vague feeling during turn-in, and generally unpredictable front end behaviour.
The Suspension Secrets Bump-Steer Tie Rod Ends are fully adjustable to address this problem. They allow the suspension's correct movement arc to be maintained, even when the car is lowered, significantly reducing and even eliminating bump-steer.
Upgrade Benefits:
- Removes bump-steer
- Improves turn-in response
- More consistent steering
- Reduces understeer
This upgrade is particularly beneficial when running kerbs and driving over undulating track surfaces, ridding the 986 and 987 chassis of unpredictability and boosting driver confidence.
Boxster Coilovers
Aftermarket coilovers are a must-have for track-focused 986 and 987 Boxster models. We recommend systems from manufacturers such as KW, Moton, Nitron and Öhlins.The 2-way Nitron R1 coilovers feature independent compression and rebound adjustment. These 2-way adjustable Boxster coilovers increase chassis response, reduce body roll, and improve overall balance for road and track driving.
2-way Coilovers Benefits:
- Independent bump and rebound tuning
- Improves handling, grip and body control
- Offers ride height adjustment
- Suitable for the road and track
Porsche 986/987 Boxster - Suspension FAQ
What is the most effective suspension upgrade for the 986/987 Boxster?
A professional suspension geometry setup delivers the biggest improvement per pound spent. Correct camber and toe settings dramatically improve steering response, stability, and tyre wear.
Do I need adjustable rear toe arms on a road car?
If you are increasing rear camber or driving the car hard on road or track, adjustable rear toe arms allow proper toe-in settings for improved corner exit traction and high-speed stability.
Are solid bushes too harsh for road use?
Solid bushes increase precision and braking stability with only a small rise in NVH. For enthusiastic road driving, the improvement in steering feel and consistency outweighs the minor comfort trade-off.
Will coilovers make the car uncomfortable?
Not necessarily. Quality 2-way systems such as the Nitron R1 allow independent bump and rebound adjustment, meaning you can tune the car for both road comfort and track performance.
Why is bump-steer a problem when lowering a Boxster?
Lowering changes suspension geometry and can cause the front toe angle to vary through suspension travel. Adjustable bump-steer tie rod ends correct the steering arc, restoring precise and predictable turn-in.
Tested and developed by Suspension Secrets through extensive road and track evaluation, these upgrades unlock the full potential of the Porsche 986 and 987 Boxster. By correcting factory understeer, improving tyre wear, and enhancing braking stability, they transform the Boxster into a more focused and confidence-inspiring driver’s car.