K&N E-0666 High-Flow Air Filter for 2013-22 Porsche Boxster/Cayman 2.7L-4.0L H6

Vehicle Fitment

• 2013-2016 Porsche Boxster (2.7L/3.4L H6)
• 2014-2016 Porsche Cayman (2.7L/3.4L/3.8L H6)
• 2020-2022 Porsche 718 Cayman (4.0L H6)
• 2021-2022 Porsche 718 Boxster (4.0L H6)

Features

• High-Flow washable oiled cotton gauze media to increase horsepower and acceleration
• Reusable design for the life of your vehicle
• Drop-in replacement into factory air box for quick installation
• Multi-layer protection for improved contaminant capture while maintaining airflow
• Pre-oiled and ready to install
• Reduces environmental waste compared to disposable filters
• No special tools required; fits OEM housing and mounts
• Backed by K&N's No-Hassle Lifetime Limited Warranty

Specifications

• Part Number: E-0666
• Filter Shape: Oval Tapered
• Height: 8.375 in (213 mm)
• Base Outside Diameter: 4.188 in (106 mm)
• Base Outside Width: 5.063 in (129 mm)
• Top Outside Length: 3.344 in (85 mm)
• Top Inside Width: 2.344 in (60 mm)
• Filter Media Material: Oiled cotton gauze
• Reusable: Yes, washable
• Warranty: Lifetime Limited

Included Components

• 1x Air Filter - K&N E-0666

Product Description

The K&N E-0666 High-Flow Air Filter is designed specifically for high-performance applications on the Porsche Boxster and Cayman families, including the modern 718 variants. This filter replaces the stock element without the need for intake or ECU modifications, offering an immediate upgrade in airflow and engine responsiveness. The washable and reusable oiled cotton gauze media allows for repeated use, often outlasting multiple disposable filters, saving money and reducing waste.

Ideal for enthusiasts seeking enhanced throttle response and long-term value, the E-0666 fits directly into the factory air box of 2013-16 Boxster (2.7L/3.4L), 2014-16 Cayman (2.7L/3.4L/3.8L), and the 2020-22 718 Cayman/Boxster with 4.0L H6 engines. Because it's pre-oiled and designed for drop-in fitment, installation is straightforward - typically under 10 minutes. This upgrade is well suited for drivers who demand performance, durability, and minimal maintenance.

Please verify your exact engine size and model year prior to purchase, as some variants may have different filter configurations. Fitment is confirmed through 2022; 2023-2025 coverage is unconfirmed at time of listing.