STILLEN 2016-2018 Nissan Maxima Rear Diffuser [Unpainted] - KB12818

Enhance the aggressive presence of your 2016–2018 Nissan Maxima (A36) with the STILLEN Unpainted Rear Diffuser (KB12818). Designed to complement the factory rear bumper lines, this race-inspired diffuser adds depth, width, and performance-focused styling that elevates the Maxima’s signature 4-Door Sports Car (4DSC) appearance.

Featuring aggressive fins and deep air channels, the diffuser visually widens the rear bumper while drawing attention to the factory exhaust cutouts. The design was developed alongside the STILLEN Stainless Steel Axle-Back Exhaust System, ensuring perfect visual harmony between the diffuser and exhaust outlets.

Manufactured from durable, impact-resistant polyurethane, the KB12818 diffuser installs without cutting, trimming, or permanent modification to the bumper. The diffuser arrives unpainted (RAW) and is ready for prep, prime, and paint—allowing complete customization. Popular finishes include gloss black, matte black, body-color matching, dark gray accents, or carbon-fiber-style wraps and hydrographics.

For easy installation, the diffuser comes pre-installed with genuine 3M automotive trim tape (OEM-grade) and includes adhesion promoter and mounting screws for secure, long-term fitment. The result is a clean, factory-plus look with a bold motorsport edge.

Designed, engineered, and backed by STILLEN’s nearly 30 years of aerodynamic expertise, this diffuser is protected by a Limited Lifetime Warranty, ensuring lasting quality and confidence.

Key Features & Benefits

• Race-Inspired Rear Diffuser Design – Aggressive fins and deep air channels
• Enhances Rear Bumper Appearance – Adds width, depth, and sport-focused styling
• Highlights Factory Exhaust Cutouts – Complements OEM and STILLEN exhaust systems
• No Cutting or Modification Required – Fully removable installation
• Pre-Installed 3M Automotive Tape – Same OEM-grade adhesive used by manufacturers
• Unpainted (RAW) – Ready for prep, prime, and paint
• Polyurethane Construction – Flexible, durable, and impact-resistant
• Limited Lifetime Warranty – Guaranteed against cracking or breakage under normal use

Vehicle Fitment

Compatible with:

• 2016-2018 Nissan Maxima [A36]

Why Choose the STILLEN Rear Diffuser KB12818?

• Designed specifically for the 2016–2018 Maxima A36 chassis
• Complements STILLEN axle-back exhaust styling
• Improves rear-end visual aggression without compromising OEM fit
• Installs quickly using automotive-grade adhesive and hardware
• Customizable finish options to match any build theme

The standard shipping rate applies to orders within the continental United States. If you intend to place an order outside of the continental US, please reach out to support@x-ph.com for assistance.