STILLEN 2014-2017 Infiniti Q50 Rear Diffuser [Matte Black] - KB11222MB

Upgrade the rear styling of your Infiniti Q50 with the STILLEN Matte Black Rear Diffuser, designed to add aggressive motorsport-inspired aesthetics while maintaining factory-quality fitment and daily-driver durability. Specifically engineered for the 2014–2017 Infiniti Q50 sedan, this diffuser dramatically enhances the lower rear profile, giving the car a more athletic and performance-oriented appearance.

Manufactured from high-strength polyurethane, the diffuser is built to withstand road debris, weather, and everyday driving conditions without cracking or warping. The race-inspired aerodynamic strake design evokes a true JGTC-style look, adding visual depth and sophistication to the Q50’s rear end.

The oversized exhaust cutouts are intentionally designed to highlight and frame your exhaust system, making this diffuser the ideal companion to a STILLEN Cat-Back Exhaust. Installation is simple and fully reversible, with OEM-grade 3M automotive tape pre-installed, requiring no cutting, drilling, or permanent modification to the factory bumper.

Finished in matte black paint, this version is ready for direct installation right out of the box, making it perfect for enthusiasts who want instant visual impact with zero prep work.

Designed, manufactured, and quality-checked in-house at STILLEN, this rear diffuser meets strict standards for fit, finish, and longevity—and is backed by a Limited Lifetime Warranty.

Key Features & Benefits

• Enhances the Rear-End Appearance of the Infiniti Q50
• Aerodynamic, Race-Car Inspired Design with Aggressive Strakes
• Durable Polyurethane Construction for Street and Daily Use
• Oversized Exhaust Cutouts Accentuate Performance Exhaust Systems
• Perfect Match for STILLEN Cat-Back Exhausts
• OEM-Style Installation with Pre-Installed 3M Automotive Tape
• No Cutting or Permanent Modification Required
• Painted Matte Black – Ready for Direct Installation
• Designed & Manufactured In-House at STILLEN
• Limited Lifetime Warranty

Vehicle Fitment

• 2014–2017 Infiniti Q50 (Sedan)

Overview

If the factory rear end of your Infiniti Q50 feels too subtle, the STILLEN Matte Black Rear Diffuser delivers a bold, performance-driven transformation. Its aggressive motorsport styling, durable construction, and effortless installation make it an ideal upgrade for enthusiasts looking to elevate their Q50’s appearance without sacrificing practicality.

For a complete aerodynamic look, pair this diffuser with a STILLEN Front Splitter and Side Skirt Extensions to finish the lower ground effects package.