2017-2019 For Audi A4 S4 B9 Diffuser With Silver Tailpipe

Quick Specs and Highlights

• Rear Lip Design: Aggressive rear valance design with integrated diffuser strakes
• Shell Material: High-grade ABS plastic or carbon fiber (see title for spec)
• Exhaust Openings: Tailpipe openings sized for factory and aftermarket exhaust tips
• Mount System: Bolt-on using factory rear bumper mounting locations
• What's Included: Diffuser panel plus exhaust tip surrounds included

Product Overview

A rear bumper diffuser replacement for the . This diffuser replaces the factory lower bumper trim with an aggressive, high-performance rear valance that frames the exhaust outlets and visually lowers the rear stance.

Key Features and Build Quality

• Stress Tolerance: Constructed from automotive-grade plastic that handles exhaust heat and road conditions.
• Gloss Retention: Gloss black coating is UV-cured for resistance to sun exposure and car wash chemicals.
• Edge Match: All mounting tabs align with factory rear bumper attachment points for a gap-free fit.
• Pipe Aperture: Exhaust tip openings are precision-cut to center factory or aftermarket tailpipes.

Vehicle Fitment and Compatibility

• ✅ Compatible: 2017-2019 Audi A4
• ❌ Incompatible: B6 (2001-2005) / B7 (2005-2008) / B8 (2009-2012) / B8.5 (2013-2016) / B9.5 (2020-2024)

💬 If you are unsure about product compatibility, please send your Vehicle Identification Number (VIN) or front and rear photos of your vehicle to us for verification.

Installation Notes

• Remove factory lower valance. Bolt new diffuser into factory mounting points.
• Check exhaust tip clearance before final tightening.