K&N 33-3031 High-Flow Left Air Filter for 2010-2015 Audi RS4/RS5 4.2L V8 F/I

Vehicle Fitment

• 2010-2015 Audi RS5 (B8, 4.2L V8, Fuel Injected) - Left side filter
• 2012-2015 Audi RS4 Avant (B8, 4.2L V8, Fuel Injected, Europe/RoW market) - Left side filter

Fitment Notes

• These RS4/RS5 4.2L V8 models use two separate air filters - this is the LEFT side filter only (33-3031); the RIGHT side filter (33-3032) is required as well for a complete replacement. K&N's own product-page title shows a shorthand "2013-2015" range, but K&N's full vehicle-specific fitment listing (confirmed across its US, UK, and EU sites, plus independent retailers) shows the complete 2010-2015 range.

Features

• Engineered to increase horsepower and acceleration versus a stock paper filter
• Rugged construction using durable, premium materials for lifetime use
• Four layers of premium cotton gauze media for high airflow and strong contaminant capture
• Only needs cleaning approximately every 75,000 miles / 5 years under normal highway driving
• Reusable K&N filter saves money versus repeatedly buying disposable OE filters
• Backed by K&N's No-Hassle Lifetime Limited Warranty
• Easy installation - pre-oiled and ready to drop into the factory air box
• Reduces landfill waste generated by disposable paper air filters

Specifications

• Shape: Panel
• Media Material: Cotton Gauze
• Washable: Yes
• Outside Length: 8.375 in (213 mm)
• Outside Width: 6.375 in (162 mm)
• Height: 1.5 in (38 mm)
• Position: Left
• Filtration Efficiency: Up to 99%
• Warranty: No-Hassle Lifetime Limited

Included Components

• 1x K&N 33-3031 Panel Air Filter (Left Side)

Product Description

The K&N 33-3031 is a direct-fit replacement panel air filter engineered for the left-side air box of the 2010-2015 Audi RS4/RS5 with the high-revving 4.2L V8. Its layered cotton gauze media is designed to deliver higher airflow than the factory paper filter, helping this naturally aspirated engine breathe more freely while continuing to trap the dirt and debris needed to protect it over the long term.

Rather than replacing a disposable paper filter every 12,000-15,000 miles, this filter can be cleaned and reoiled, typically going up to 75,000 miles between services under normal highway driving. It installs directly into the factory air box using the stock mounting points, so no cutting, drilling, or intake modifications are required.

Because the RS4/RS5's 4.2L V8 draws air through two separate air boxes, this left-side filter should be paired with K&N's right-side filter (33-3032) for a complete, matched replacement. Together they're a straightforward, reusable upgrade for owners looking to reduce long-term filter costs while keeping the factory intake setup.