Description
Complete the rear aerodynamic package on your Porsche 718 Cayman GT4 or GT4 RS with the Verus Engineering Rear Diffuser Panel Kit. Designed for vehicles running an aftermarket exhaust, this kit fills the large openings left behind when the factory suitcase-style mufflers are removed, helping restore clean underbody airflow and improve the performance of the factory rear diffuser.
The factory 718 GT4 diffuser is designed around the original exhaust configuration. When the OEM suitcase mufflers are replaced with an aftermarket exhaust, the resulting open areas can disrupt airflow and create additional drag. The Verus Engineering diffuser panels and integrated strakes help contain the horseshoe-shaped vortices generated behind the rear wheels while feeding cleaner air into the factory center diffuser.
Using in-house scan data, Verus Engineering designed the panels for near-OEM fit and finish. Advanced aerodynamic analysis and CFD optimization were also used to improve airflow management compared with the stock configuration.
This kit is ideal for 718 GT4 and GT4 RS owners running aftermarket exhaust systems who want improved rear diffuser efficiency, reduced drag, reduced lift, and a more complete underbody aerodynamic package.
Important: This kit is NOT compatible with OEM mufflers.
Key Features
- Designed for the Porsche 718 Cayman GT4 / GT4 RS
- Specifically intended for vehicles equipped with an aftermarket exhaust
- Fills the voids left by factory suitcase-style muffler removal
- Helps feed cleaner air into the factory center diffuser
- Helps control airflow and rear-wheel horseshoe vortices
- Helps reduce aerodynamic drag
- Helps reduce rear-end lift
- Can contribute to improved fuel economy
- Provides a slight increase in rear downforce
- CFD-optimized aerodynamic design
- Near-OEM fit and finish
- Simple, non-invasive bolt-on installation
- No major modification required
Aerodynamic Performance
The Verus Engineering diffuser panels work by filling the open areas created when the factory suitcase-style mufflers are replaced with an aftermarket exhaust. By closing these gaps with properly shaped panels and diffuser strakes, the system helps better control underbody airflow and allows the factory rear diffuser to operate more effectively.
The panels help contain the aerodynamic vortices generated behind the rear wheels while directing cleaner airflow toward the center diffuser. The result is improved diffuser efficiency, reduced drag, and decreased lift.
Material & Construction
The diffuser panels are manufactured from 5052 aluminum sheet metal for a strong and lightweight construction.
Each panel is:
- CNC laser cut
- CNC press-brake bent
- Finished with a durable black powder coat
- Secured with stainless steel hardware
Fitment
Fits:
- Porsche 718 Cayman GT4
- Porsche 718 Cayman GT4 RS
Important: Designed for vehicles using an aftermarket exhaust system that replaces the factory suitcase-style mufflers.
Does NOT fit / is not compatible with:
- OEM factory mufflers
Installation
The Verus Engineering Rear Diffuser Panel Kit uses a simple, non-invasive bolt-on design. The included brackets and hardware allow the panels to be securely installed in the factory rear diffuser area without requiring major modifications.
What's Included
- Left-hand diffuser panel
- Right-hand diffuser panel
- Diffuser panel brackets — 2
- Complete hardware kit
Specifications
- CFD-optimized design
- 5052 aluminum sheet metal construction
- CNC laser cut
- CNC press-brake bent
- Black powder-coated finish
- Stainless steel hardware throughout
