K&N E-0664 High-Flow Replacement Air Filter for 2013-2018 Audi RS6 RS7 4.0L V8

Vehicle Fitment

• 2013-2018 Audi RS6 - Avant (C7/C7.5, 4.0L Twin-Turbo TFSI V8, quattro AWD); includes RS6 Performance (2015-2018)
• 2013-2018 Audi RS7 - Sportback (C7/C7.5, 4.0L Twin-Turbo TFSI V8, quattro AWD); includes RS7 Performance (2015-2018)

Fitment Notes

• 4.0L Twin-Turbo TFSI V8 engine only - fits both standard (553 hp) and Performance (597 hp) variants
• RS6 C7 is Avant (estate/wagon) body style only - the C7 RS6 was not offered as a sedan in any market
• RS7 C7 is Sportback (5-door fastback) body style only
• All C7 RS6 and RS7 models are quattro AWD - no RWD variants were produced
• Direct drop-in replacement - replaces OEM filter Audi/VW 4G0133843L
• Sold individually - one filter per vehicle

Features

• High-flow oiled cotton gauze media increases airflow over the factory paper filter to support the breathing demands of the 4.0L twin-turbo V8 at all engine speeds
• 4-layer cotton gauze construction treated with K&N's tacking agent traps contaminants without restricting airflow to the turbocharged V8
• Custom-engineered to fit directly into the factory airbox - no modifications, adapters, or special tools required
• Pre-oiled and ready to install straight out of the box
• Cleaning required only every 75,000 miles under normal highway driving conditions
• Washable and reusable - eliminates recurring OEM paper filter replacement costs
• Made in the USA - backed by K&N's No-Hassle Lifetime Limited Warranty

Specifications

• Part Number: E-0664
• Filter Shape: Round
• Filter Material: Multi-Layer Oiled Cotton Gauze
• Filter Color: Red
• Inside Diameter: 3.938 in (100 mm)
• Outside Diameter: 6.125 in (156 mm)
• Height: 7.313 in (186 mm)
• Flanges: None
• Inner Wire: No
• OE Cross Reference: Audi/VW 4G0133843L
• Pre-Oiled: Yes - ready to install
• Service Interval: Every 75,000 miles (normal highway driving)
• Washable and Reusable: Yes
• Quantity: Sold individually
• Made in USA: Yes
• Warranty: No-Hassle Lifetime Limited

Included Components

• 1x K&N E-0664 High-Flow Round Replacement Air Filter (pre-oiled cotton gauze)

Product Description

The K&N E-0664 is a direct drop-in high-flow replacement air filter engineered for the 2013-2018 Audi RS6 Avant and RS7 Sportback equipped with the 4.0L twin-turbo TFSI V8 engine - covering both the standard (553 hp) C7 and the higher-output RS6/RS7 Performance variants (597 hp) on the C7.5 facelift platform. As a direct replacement for OEM filter 4G0133843L, the E-0664 installs into the factory airbox without modifications, delivering K&N's layered oiled cotton gauze media in place of the restrictive paper element. The result is increased airflow to the twin-turbo V8 supporting improved throttle response and a more pronounced induction sound under hard acceleration.

The E-0664 ships pre-oiled and ready to install, with a service interval of 75,000 miles under normal highway driving conditions - significantly longer than standard OEM paper filter replacement intervals. Its washable and reusable design eliminates the ongoing cost of disposable filters and reduces landfill waste. Made in the USA and backed by K&N's No-Hassle Lifetime Limited Warranty, the E-0664 is the simplest and most cost-effective performance upgrade available for C7 RS6 and RS7 owners.