Pipercross Panel Car Air Filter Cylindrical PX1921

Pipercross PX1921 Cylindrical Panel Air Filter – High-Flow Upgrade for Audi A6 C7 Avant & A7 Sportback

Premium Drop-In Performance Air Filter | Replaces OEM 4G0 133 843 L

Compatible With:

• Audi A6 C7 Avant (4G5, 4GD)

• Audi A7 Sportback (4GA, 4GF)

Maximise Your Audi's Performance with the Pipercross PX1921

Enhance the driving experience of your Audi A6 or A7 with the Pipercross PX1921 Cylindrical Air Filter. Precision-engineered to replace the restrictive factory paper air filter (OEM Part Number: 4G0 133 843 L), the PX1921 delivers 30–40% more airflow, resulting in improved throttle response, increased efficiency, and a more responsive power band.

Whether you're covering long distances in your Audi A6 Avant or enjoying the luxury performance of your A7 Sportback, the PX1921 ensures your engine breathes cleaner, cooler air — mile after mile.

Key Features & Benefits

🔧 Direct OEM Replacement (Drop-In Fitment)

No modifications required — simply replace your stock paper filter with the PX1921 for instant performance and efficiency benefits.

💨 30–40% More Airflow

Designed using advanced multi-layer foam technology, the PX1921 delivers significantly increased airflow compared to standard paper filters — improving combustion and power delivery.

⛽ Improved Fuel Efficiency

Better airflow allows the engine to work more efficiently, helping you get more miles per gallon and reduce fuel costs over time.

♻️ Washable & Reusable

Forget disposable filters. The PX1921 is fully washable, reusable, and built to last the lifetime of your vehicle. Service after service, it saves you money and reduces landfill waste.

🇬🇧 British Made, Motorsport Proven

Proudly crafted in the UK, Pipercross filters are used by motorsport teams around the world. Built to exacting standards, they deliver professional-grade performance in everyday driving.

✅ Lifetime Warranty

Your investment is protected by a limited lifetime warranty, offering confidence and peace of mind for years to come.

Ideal For:

• Audi drivers seeking OEM+ performance

• Long-distance commuters and spirited drivers

• Eco-conscious motorists wanting a reusable alternative

• Vehicles with mild performance upgrades or ECU remaps

Product Specifications

• Product Code: PX1921

• Type: Cylindrical Performance Panel Filter

• Fitment: Direct replacement for OEM filter

• OEM Reference: 4G0 133 843 L (Audi)

• Airflow Increase: 30–40% over stock filter

• Serviceability: Washable & reusable

• Warranty: Limited lifetime

• Country of Origin: United Kingdom

Vehicle Compatibility

Audi

• A6 C7 Avant (4G5, 4GD)

• A7 Sportback (4GA, 4GF)

Why Choose Pipercross PX1921?

The PX1921 isn’t just an air filter — it’s a performance and sustainability upgrade. Designed to fit perfectly into your Audi’s factory airbox, it offers better airflow, longer service intervals, and reliable long-term performance — without compromising on fit, function, or filtration.