STILLEN 2018-2021 Kia Stinger GT (AWD/RWD 3.3TT) Unpainted Rear Diffuser - KB26002

The STILLEN Unpainted Rear Diffuser for the 2018–2021 Kia Stinger GT [KB26002] is designed to enhance the rear profile of the Stinger with aggressive, race-inspired styling while maintaining OEM-level fitment and durability. This diffuser visually extends the width of the rear bumper, creating a lower, wider, and more performance-focused stance that perfectly complements the STILLEN front splitter.

Manufactured from high-quality polyurethane, this rear diffuser is built to handle daily driving conditions without cracking or deforming. Unlike rigid composite alternatives, polyurethane offers flexibility and long-term durability while maintaining excellent surface quality. The diffuser fits snugly against the factory rear bumper, delivering a factory-like appearance once installed.

Finished unpainted, the diffuser arrives ready for final prep and paint, allowing you to color-match it to your vehicle or customize the finish to your build. Installation is completely non-invasive, requiring no cutting or permanent modifications. OEM-grade 3M automotive tape is pre-installed, ensuring a secure yet removable installation.

Pair this rear diffuser with the matching STILLEN front splitter, cat-back exhaust system, and short ram intake to complete a cohesive aero and performance package for your Kia Stinger GT.

Vehicle Fitment

Compatible Vehicles:

• 2018-2021 Kia Stinger GT (3.3TT)

Drivetrain:

• AWD & RWD

Key Features and Benefits

• Race-inspired rear diffuser fin design
• Visually widens the rear bumper and overall stance
• Matches the STILLEN front splitter styling
• Durable polyurethane construction
• Excellent OEM-style fitment
• Unpainted – ready for primer and paint
• No cutting or modification to the bumper
• Removable installation
• Pre-installed OEM-grade 3M automotive tape
• Limited Lifetime Warranty

Construction & Finish

• High-strength polyurethane material
• Flexible and impact-resistant
• Unpainted finish – ready for customization
• Designed for long-term durability and daily-driver use

Installation

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

Recommended Pairings

• STILLEN 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