Verus Rear Diffuser Panel Kit for Porsche 718 GT4

The factory 718 GT4 center diffuser works surprisingly well, right up until you remove the big suitcase style mufflers. Once you fit an aftermarket exhaust, the open cavities behind the bumper start acting like a parachute and dirty up the airflow leaving the rear of the car. The Verus Rear Diffuser Panel Kit closes that area off and guides the air where it should go, helping the OEM diffuser do its job and giving the car a more stable, planted feel at speed.

Designed Around The 718 GT4

Using in house 3D scan data of the 718 GT4 chassis, Verus modeled these panels to follow the factory underbody closely and integrate with the stock center diffuser. The result is a piece that looks and fits like it could have come from Porsche while fixing a problem that only shows up once you upgrade the exhaust. Development includes CFD analysis to keep drag in check and maintain clean, attached flow into the diffuser.

Aero Benefits

• Closes the void left after removing the stock mufflers, reducing turbulence behind the bumper.
• Feeds the factory diffuser cleaner airflow for a mild increase in rear stability and driver confidence at speed.
• Helps trim drag and rear lift, which improves high speed balance and can offer small gains in efficiency on longer drives.
• Visually and functionally completes the rear underbody when paired with other GT4 aero upgrades.

Motorsport Grade Construction

• CFD shaped panel and strake geometry that works with the OEM diffuser instead of fighting it.
• Laser cut, CNC formed aluminum panels for consistent fit and stiffness.
• Durable black powder coat finish that disappears under the car and holds up to track use.
• Stainless mounting hardware included.

Installation And Fitment

The kit is a straightforward, bolt on install. Two formed panels and brackets pick up existing chassis locations, and all required hardware is in the box. Basic hand tools and a lift or ramps are all that is needed for most DIY installs. Verus also provides an installation video and a full PDF manual for step by step guidance.

Fitment Notes

• Vehicle: Porsche 718 Cayman GT4
• Designed to work with the OEM center diffuser.
• Not compatible with OEM mufflers. Intended for cars using an aftermarket exhaust that removes the factory suitcase style mufflers.

If you have questions about how this piece fits into your overall aero and exhaust package, reach out and we can help you decide if it is the right move for your GT4.