911 991 GT3 RS Modification Guide
The Porsche 911 991 GT3 RS is one of the most track-focused and high-performance road cars ever made. With its racing heritage, precise handling, and naturally aspirated 4.0-litre engine, it’s a machine built for those who appreciate the art of driving. For many owners, the GT3 RS is perfect in stock form, and modifying it may feel unnecessary. However, for those looking to enhance the driving experience further, there are several modification options available to improve performance, aesthetics, and overall enjoyment.
This guide offers some inspiration for those considering modifications to their 991 GT3 RS, focusing on upgrades that can enhance the driving experience without compromising the core qualities of the car.
Check out our 911 991 GT3RS dedicated page here
Brake System: PCCB to Steel Brake Conversion
The 991 GT3 RS comes with Porsche Carbon Composite Brakes (PCCB) as standard, offering exceptional stopping power and light weight. However, some owners may prefer to swap these out for steel brake discs for a more predictable, durable, and cost-effective solution, especially if they intend to use the car for track days.
If you do decide to convert to steel brakes, ensure that you’re using high-performance pads and fluids to match the upgraded braking system.
Exhaust System: Enhancing the Sound
The 991 GT3 RS already has an incredible exhaust note, but for those who want an even more dramatic sound, upgrading the exhaust system can make a noticeable difference. There are several options to consider:
- Sports Exhaust System: Many owners opt for an aftermarket sports exhaust system that offers a deeper and more aggressive tone. These systems typically reduce weight and improve the sound without compromising performance.
- Full Exhaust Systems: For the ultimate sound experience, a full exhaust system replacement can increase both noise and performance, especially when paired with performance headers and cat-bypass pipes.
- Valved Exhaust Systems: If you’re looking for an adjustable sound, a valved exhaust allows you to control the volume of the exhaust depending on driving conditions, offering a quieter sound for daily use and a louder, more aggressive note when desired.
Choosing an exhaust system that’s well-designed and engineered for the GT3 RS will ensure that the car’s performance is not negatively affected by the modification. Check out our GT3RS exhaust options here.
Suspension: Lowering or Adjusting for Performance
The 991 GT3 RS comes with an adjustable suspension system, but for those looking to lower the car for improved handling or aesthetics, aftermarket suspension components can further refine the setup.
- Lowering Springs: Replacing the stock springs with lower options can enhance the car’s appearance, giving it a more aggressive stance. Additionally, lowering the car slightly can improve the handling by lowering the centre of gravity.
- Adjustable Coilovers: For track-focused driving, adjustable coilovers allow for precise tuning of ride height, compression, and rebound damping. This can help owners tailor the suspension setup to their specific needs, whether for road use or regular track days.
- Stiffer Sway Bars: Upgrading the sway bars can reduce body roll and improve cornering performance, making the car feel more agile in tight corners.
However, it’s important to remember that suspension modifications can alter the car’s ride comfort, so it’s crucial to strike a balance between track-focused performance and road usability.
Aesthetic Modifications: Personalising the Look
While the 991 GT3 RS is a beautifully designed car, many owners choose to personalise their vehicle to make it stand out even more. Aesthetic modifications are one of the easiest ways to make the car feel unique to the owner.
- Carbon Fibre Accents: Adding carbon fibre elements such as mirror caps, front splitters, and rear wings can not only improve the car’s aesthetic appeal but also save weight.
- Custom Wheels: Upgrading to lightweight, forged wheels can enhance the car’s look while reducing unsprung weight, which can improve handling. You can also choose custom finishes to give the car a more personalised appearance.
- Livery and Decals: Many owners opt to add racing stripes, numbers, or other livery elements to give their GT3 RS a more motorsport-inspired look.
These modifications may not improve performance directly, but they can contribute to the overall driving experience by making the car feel more aligned with the owner’s personal style.
Weight Reduction: Shed Some Pounds
The 991 GT3 RS is already a lightweight vehicle, but some owners may wish to further reduce weight to increase performance, particularly on the track.
- Lightweight Seats: Replacing the standard sports seats with bucket-style racing seats can shed several kilograms and provide better support during high-performance driving. Options like the carbon fibre bucket seats not only reduce weight but also increase rigidity.
- Removal of Sound Deadening: For those looking for a more extreme approach, removing some of the interior sound deadening material can lighten the car and enhance the engine and exhaust sounds.
These modifications can make a noticeable difference in performance, but they can also affect comfort and daily usability, so they should be considered carefully.
Engine and Tuning: Enhancing Performance
The GT3 RS’s 4.0-litre engine is already a masterpiece, but for those seeking even more power, there are performance upgrades available.
- Engine Tune/ECU Remap: A professional ECU remap can increase power output and torque, especially if paired with other modifications like a sports exhaust system or high-flow air filters.
- Cold Air Intake: Upgrading to a high-performance air intake system can help the engine breathe more efficiently, potentially increasing power and improving throttle response.
However, any engine modification should be approached with caution, as it may affect the reliability and longevity of the engine. It’s important to consult with experts and ensure any modifications are compatible with the car's performance characteristics.
Conclusion
While the 991 GT3 RS is already a finely tuned machine, there are several modifications that can enhance the driving experience, whether you’re looking for improved performance, a more aggressive sound, or a more personalised look. However, it's essential to remember that the RS models are designed to be near-perfect in stock form, so any modifications should be carefully considered to maintain the car’s balance and overall character.
For those who want to push their GT3 RS to the next level, these modifications can provide the inspiration needed to take the car’s performance and enjoyment to new heights.