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In this suspension tuning guide, we'll explain how to unlock more handling performance from your 997-series Porsche 911 GT3 and GT3 RS. We’ll cover the standard car’s handling flaws and reveal the best ways to fix them using Suspension Secrets upgrades.
997 GT3 & GT3 RS Overview
The 997.1 GT3 debuted in summer 2006 and the GT3 RS followed soon after in the autumn. The GT3 retains the Carrera's narrow body, while the 20kg lighter GT3 RS boasts a wider shell (+44mm at the rear for the wider track). Both cars have aerodynamic enhancements, although the GT3 RS model's are more extreme and track-focused.
The 3RS is packed with more adjustable suspension components, including split wishbones. There's a more rigid rear setup and more aggressive differential on the 3RS, too. Tucked into the rear of both 997.1 cars is a 3.6-litre Mezger flat-six producing 415hp/405Nm. However, the GT3 RS is considered the racier of the two powerplants thanks to its 200rpm higher redline (8,400rpm) and single-mass lightweight flywheel.
The 997.2 GT3 and GT3 RS of 2009/2010-2012 run a 3.8-litre flat-six developing 435hp and 450hp respectively. Dynamic engine mounts are standard on the RS and optional on the GT3, while the Porsche Active Suspension Management features revised tuning. Aerodynamic downforce is significantly increased on both cars, in part by their larger rear wing, and both models have stiffer front springs.
Read on to find out which 997 suspension upgrades make the biggest difference to handling performance, overall feel, and lap times…
Suspension & Handling Problems (And How to Fix Them)
Age is the biggest enemy of 997 suspension components. Rubber bushes and damper parts degrade over time, leading to handling issues. Being an older generation of 911, drivers may find the steering less precise and more unsettled. We also find the GT3 and GT3 RS sensitive to geometry changes, making expert knowledge of the 997 chassis doubly important.
Main 997 Problems
- Imperfect road surfaces unsettle the car
- Limited low-speed damping sophistication
- Unpredictable handling caused by tired original parts
- Limited front and rear camber adjustment
These issues stop the Porsche 997 from handling at its best, but leave an opportunity for suspension upgrades to deliver significant performance gains.
The most effective fixes are:
- Increasing front camber to reduce understeer & improve tyre wear
- Adjusting toe angle to enhance traction and stability
- Replacing rubber bushes with solid bushes to increase precision
- Correcting suspension geometry with a professional alignment
With these suspension changes made, the 997 GT3 and GT3 RS will perform at an entirely new level 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 997 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 997 GT3 & GT3 RS
Below are the best suspension upgrades you can make to the Porsche GT3 and GT3 RS (997). These aftermarket parts will reduce understeer, enhance cornering grip, improve rear traction and dramatically reduce hesitation in the car's responses.
Camber Shim Kit
Although the 997-generation GT3 and GT3 RS offer front and rear camber adjustment, the range of movement is relatively limited. This compromises any fast road or track-based setup and inevitably leads to increased/uneven tyre wear during high-speed driving.
Our Suspension Secrets camber shims allow more negative camber angle to be dialled into the front axle geometry.
Benefits of More Negative Camber:
- Improved cornering grip
- Better use of tyre contact patch
- Enhanced steering feel
- More neutral chassis balance
With this camber shim kit installed, the 997 GT3 and GT3 RS will achieve even greater cornering speeds, with turn-in response and steering communication also improved.
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 997 GT3 and GT3 RS boast stiffer springs, revised damping and more aggressive alignment settings than regular 911s. 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 997 GT3 and GT3 RS 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 997 chassis of unpredictability and boosting driver confidence.
Adjustable Camber Arms
Rear suspension geometry influences chassis balance, traction and tyre wear. Rear camber can be adjusted on stock 997 GT3 and GT3 RS models, however to achieve fast road and track setups you need another solution.
The Suspension Secrets Rear Camber Arms are fully adjustable and allow much more aggressive settings to be dialled in than what the stock bolts offer. Increasing negative camber without compromising toe angle boosts mid-corner traction and stops tyres overheating.
Why Camber Arms Matter:
- Increase camber adjustment range
- Geometry remains stable under load
- Improved tyre wear
- Fine-tuning of chassis balance
The factory arms use rubber bushes, whereas the Suspension Secrets camber arms feature solid Fluro rose joints, which further improve precision and response.
Coilover Upgrade
ORDER 997 COILOVERS
Aftermarket coilovers are a must-have for track-focused GT3 and GT3 RS models. We recommend a three-way system from manufacturers such as KW, Moton, Nitron or Öhlins.
The 3-way KW V4 Clubsport coilovers feature low- and high-speed bump adjustment, plus rebound adjustment. Three-way adjustable coilovers allow you to control grip level, chassis balance, comfort level and stability - independently of each other. This is why they're used in professional motorsport.
How 3-way Coilovers Work
Rebound: How fast the suspension extends after compression
Low-speed compression: Affects handling balance
High-speed compression: Affects ride quality and grip over bumps
Aftermarket coilovers also allow you to adjust front and rear ride heights. Once professionally set up, coilovers help the tyres maintain more consistent contact with the road, improving handling performance.
Porsche 997 GT3 & GT3 RS - Suspension FAQ
What handling problems are common on the 997 GT3 & GT3 RS?
Age-related wear in rubber bushes and dampers can cause unpredictable handling, reduced steering precision, understeer, and instability over uneven surfaces. Limited camber adjustment from factory settings also restricts ultimate cornering performance.
What is the most effective first suspension upgrade?
A professional suspension geometry alignment is the most cost-effective first step. Optimising camber and toe settings sharpens steering response, improves grip, enhances rear traction, and ensures consistent tyre wear.
How does increasing negative camber improve performance?
Adding more negative camber improves cornering grip by maximising the tyre contact patch during hard driving. It reduces understeer, enhances steering feel, and prevents excessive outer-edge tyre wear - especially during track use.
Why replace factory rubber bushes with solid bushes?
Rubber bushes flex under load and degrade over time, reducing precision. Solid bushes eliminate unwanted movement, resulting in sharper steering, improved braking stability, and more consistent suspension geometry under high loads.
Are coilovers necessary for track-focused driving?
For serious track use, yes. Three-way adjustable coilovers allow independent control of rebound, low-speed compression, and high-speed compression. This improves grip, balance, and stability while allowing precise ride height adjustment for optimal performance.
Tested and developed by Suspension Secrets through extensive road and track evaluation, these upgrades unlock the full potential of the Porsche 997 GT3 and GT3 RS. By correcting factory understeer, improving tyre wear, and enhancing braking stability, they transform the GT3 and GT3 RS into the focused, confidence-inspiring driver’s cars they were meant to be.