Porsche 718 Spyder/GT4 Tuning Guide

The Porsche 718 Cayman GT4 4.0 and Boxster Spyder 4.0 (2019-2023) are already exceptionally capable sports cars straight from the factory. With their naturally aspirated 4.0-litre flat-six engines, sharp handling, and track-focused suspension, these models provide a driving experience that is hard to improve on. As such, many owners opt not to make drastic changes. However, some modifications can enhance certain aspects of the car, whether that’s improving performance, aesthetics, or the driving experience.

If you're considering modifying your 718 GT4 or Spyder, there are several options available, with the most common upgrades falling into a few categories: performance-oriented changes (especially to the braking system), aesthetic enhancements, and exhaust modifications. Below, we’ll take a look at some of the most popular options.

Check out the full range of 718 GT4/Spyder parts available from JXL Performance here

Performance Modifications

While the GT4 and Spyder are designed for high performance out of the box, certain modifications can elevate the driving experience, particularly for owners who plan to take their cars to the track or want to refine specific aspects of the car.

Braking System

The standard braking setup in the GT4 and Spyder is already excellent, but for those who frequently track their car or desire more responsive braking, upgrading to Porsche Ceramic Composite Brakes (PCCB) can be a worthwhile investment. These brakes offer lighter weight and superior stopping power compared to the standard steel discs.

For owners who don’t want to opt for the full PCCB package, upgrading the brake pads and using higher-performance brake fluid can still provide a noticeable improvement in performance. Track-focused brake pads can offer better heat dissipation and reduced fade during high-stress driving. Check out our range of braking options for your GT4/Spyder

Suspension Upgrades

Although the factory suspension is designed to provide excellent handling, some owners may prefer an even sharper setup. Adjustable coilover suspension kits are available, which allow for more fine-tuned handling characteristics, such as ride height and damping rates. This can make a difference for those who want to fine-tune the car’s handling for track use or personal preference. Check out available suspension products here.

Engine Modifications

While the 4.0-litre engine in both the GT4 and Spyder is already powerful and well-tuned, there are a few modifications available that can improve performance. Upgrading the air intake system can allow the engine to breathe more freely, while ECU remapping can optimise the engine’s performance for more power or improved throttle response. Keep in mind, any modifications to the engine will likely void the manufacturer’s warranty, and it’s crucial to ensure modifications are done by reputable specialists.

Aesthetic Modifications

The 718 GT4 and Spyder are visually striking cars, and while many owners prefer to keep the factory look, there are plenty of options for those who want to add a more personalised touch.

Carbon Fibre Parts

Porsche offers a range of carbon fibre parts for the 718 models, from carbon mirrors and spoilers to carbon fibre interior trim. These not only provide a motorsport-inspired look but also reduce weight in key areas of the car. Replacing the rear wing or front splitter with carbon fibre components is one of the most popular aesthetic modifications for owners seeking a more aggressive appearance.

Wheels

A common modification on the GT4 and Spyder is the replacement of the factory wheels with lighter, aftermarket forged alloy wheels. Not only do these improve the car’s appearance with a more custom design, but they also reduce unsprung weight, which can positively affect handling and ride quality.

Livery and Stripes

For those looking to add a motorsport-inspired touch, vinyl decals, racing stripes, or custom livery can be a simple yet effective way to personalise the car. These modifications can be removed at any time, making them a non-permanent way to change the car's appearance.

Exhaust Modifications

The exhaust note is one of the defining characteristics of any Porsche, and the 718 GT4/Spyder is no exception. While the factory exhaust system provides a satisfying sound, there are several ways to enhance the auditory experience.

Sports Exhaust System

Porsche offers an optional sports exhaust system, which can deepen the exhaust tone and provide a more aggressive note. 

Manifold and Silencer Deletes

For a more noticeable increase in sound, some owners choose to go for a manifold upgrade or even a silencer delete. Removing or replacing the factory manifold with a performance unit can increase the volume and aggressiveness of the exhaust note. Silencer deletes also improve sound but may not always be road legal, depending on local regulations. Keep in mind that such modifications can also affect emissions, so it’s important to check legal requirements in your region before making these changes.

GPF-Back Exhausts

The Gasoline Particulate Filter (GPF), introduced on newer models to meet emissions standards, can slightly restrict exhaust flow and tone. Some owners opt for a GPF-back exhaust system, which replaces the section of the exhaust system after the GPF, resulting in a louder and more aggressive sound. This modification can be particularly appealing for those who want to improve the auditory experience without completely removing the factory exhaust system. For owners looking for a further step up check out our current exhaust options for your 718 GT4/Spyder here.

Conclusion

The Porsche 718 GT4 and Boxster Spyder 4.0 are already superb vehicles, offering incredible performance and handling straight from the factory. Many owners choose not to make extensive modifications, as the cars are more than capable in their stock form. However, for those who want to personalise their cars or enhance specific performance aspects, there are plenty of opportunities for improvement.

The most common modifications include upgrading the braking system, exhaust enhancements, and aesthetic changes like carbon fibre parts and new wheels. If you're planning to modify your 718, always ensure that any changes made are from reputable sources and in line with your intended use of the car, whether for road or track driving.

Ultimately, the best modifications are those that enhance the experience of driving an already exceptional sports car without compromising its core performance.