STILLEN 2018-2021 Kia Stinger GT (AWD/RWD 3.3TT) Matte Black Rear Diffuser - KB26002MB

The STILLEN Matte Black Rear Diffuser for the 2018–2021 Kia Stinger GT [KB26002MB] delivers a refined, aggressive upgrade that enhances the rear styling while maintaining OEM-level fit and finish. Finished in a factory-style matte black, this diffuser is ready for direct installation, adding a premium, motorsport-inspired look straight out of the box.

Designed to visually widen the rear bumper, the race-inspired fin layout gives the Stinger GT a lower, more planted stance that perfectly complements the STILLEN front splitter. The diffuser fits snug like OEM, preserving the factory body lines while elevating the car’s overall presence.

Constructed from durable polyurethane, this rear diffuser is flexible, impact-resistant, and built to withstand daily driving conditions. Unlike brittle composite alternatives, polyurethane maintains its shape and finish over time. Installation is non-invasive and fully reversible, with OEM-grade 3M automotive tape pre-installed—no cutting, drilling, or permanent modifications required.

Pair this matte black rear diffuser with other STILLEN aerodynamic and performance upgrades to create a cohesive, high-end appearance for your Kia Stinger GT.

Vehicle Fitment

Compatible Vehicles:

• 2018-2021 Kia Stinger GT (3.3TT)

Drivetrain:

• AWD & RWD

Key Features and Benefits

• Matte black finish – ready for direct installation
• Race-inspired rear diffuser fin design
• Adds a luxurious, performance-oriented presentation
• Visually widens the rear bumper
• Matches the STILLEN front splitter
• Excellent OEM-style fitment
• Durable polyurethane construction
• No cutting or modification to bumper
• Removable installation
• Pre-installed OEM-grade 3M automotive tape
• Limited Lifetime Warranty

Construction & Finish

• High-quality polyurethane material
• Flexible and impact-resistant
• Factory-style matte black finish
• Designed for daily-driver durability

Installation

• Direct-fit application
• No drilling or cutting required
• Pre-installed 3M automotive tape
• Professional installation recommended for best alignment

Recommended Pairings

• STILLEN Matte Black Front Splitter for Kia Stinger GT
• STILLEN Cat-Back Exhaust System (2.5” Dual Split / Quad Tips)
• STILLEN Short Ram or Cold Air Intake System