REAR DIFFUSER. REAL RESULTS
A true rear diffuser engineered to generate real aerodynamic downforce, manufactured from aerospace-grade prepreg carbon fiber. Vortici is designed specifically for S550 and S650 Mustangs equipped with the GT350, GT500, Mach 1, or Dark Horse rear diffuser panel.
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Carbon FIber
02
Low Profile
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Real DownForce
Real Carbon,
Real Impact.
Vortici includes two rear diffusers—one left and one right—with two Venturi tunnels integrated into each diffuser. Together, they generate 30.48 pounds of downforce at 130 mph while producing just 8 pounds of drag, resulting in an impressive 3.79:1 downforce-to-drag ratio.
Inspired by the greats
I started designing rear diffusers back in 2005, when I first saw the rear diffuser of a 2005 Ford GT at the shop where I grew up. Its curved tunnels immediately caught my attention and led me to study the science behind Venturi tunnels, as well as Bernoulli's principle of shaping airflow to generate downforce.
That car became the inspiration for BTI Vortici.
Designed with those principles in mind, Vortici attaches to the factory rear diffuser and adds four Venturi tunnels beneath the vehicle. As air accelerates through the tunnels, the geometry generates multiple vortices that help create meaningful aerodynamic downforce while keeping the increase in drag remarkably low.
3d scanned for accuracy
To create Vortici, we started with the OEM rear diffuser panel. We 3D-scanned the factory panel to create an accurate digital model, ensuring that Vortici would achieve a precise, factory-level fit.
Venturis
Each Vortici tunnel is engineered to generate as much downforce as possible within its compact footprint, while minimizing the associated drag penalty. The tunnels accelerate and draw air from beneath the rear diffuser, shaping the airflow upward and generating two large counter-rotating vortices that produce additional downforce.
Low Profile Diffuser
When designing Vortici, we felt it was important to create a diffuser that you could actually live with every day. The goal was never to build the largest, most aggressive diffuser—one that extends far beyond the rear of the car and hangs millimeters from the ground.
Instead, we focused on creating a design that minimizes the compromise to ground clearance while still delivering a meaningful aerodynamic gain in downforce. Vortici was engineered to strike the balance between real-world usability and aerodynamic performance.
Real Data
BTI Vortici was tested at multiple speeds representative of cornering speeds experienced on racetracks around the world. Across every test condition, Vortici consistently achieved a 3.79:1 downforce-to-drag ratio, demonstrating its ability to generate substantial downforce with minimal aerodynamic drag
aerospace grade carbon fiber
Not all carbon fiber is the same
ac duct uses prepreg carbon fiber the same that is used in Formula 1 and planes like Airbus A400M, Boeing 787, FA-18 fighter, and the Eurofighter.
Prepreg carbon
Prepreg carbon fiber is the same class of material used in Formula 1 and other top-tier motorsports applications. Prepreg material arrives with a precisely controlled amount of thermoset resin already infused into the fabric—hence the name “prepreg.” This optimized resin-to-fiber ratio produces lighter, stronger, and more consistent components.
Prepreg carbon fiber also delivers two additional benefits: increased heat resistance and greater structural strength.
What’s Included:
2022
2021
2020
Unpainted Prepreg Vortici (Right and Left)
Rivnuts and bolts (Riveter not included)
designed to fit:
2015-2020 GT350/GT350R
2020-2023 Mach 1
2020-2022 GT500
2024- DarkHorse
2026- DarkHorse SC
handmade with pride in the usa
Vortici
$995.00
BTI Vortici enhances both the aerodynamics and appearance of your Mustang in a sleek, low-profile package. Constructed from aerospace-grade prepreg carbon fiber, Vortici delivers meaningful aerodynamic performance without compromising the car’s aesthetics or everyday usability.
Vortici redefines the rear diffuser for the S550 and S650 Mustang.