Nissan / Infiniti Filter

The K&N Engineering Nissan / Infiniti Filter (Model 33-2031-2) is a premium reusable air filter element engineered for serious enthusiasts who demand superior engine performance and longevity. As a mechanic, you know that restrictive OEM air filters rob horsepower and fuel economy—this panel-style cotton filter element solves that problem by delivering consistent, high-flow filtration across Nissan and Infiniti platforms. Whether you're maintaining a daily driver or tuning a modified build, K&N's reputation for quality filtration makes this element a go-to upgrade for those unwilling to compromise on engine breathing.

This air filter element uses K&N's signature oiled cotton construction—a design that balances maximum airflow with effective particulate capture far superior to conventional paper filters. The panel configuration (measuring 11 x 6.563 inches with a 1.125-inch profile) ensures compact installation while maintaining substantial surface area for extended service intervals. The washable, reusable cotton media is treated with K&N's proprietary oil formula, which traps dust and contaminants without choking airflow, resulting in measurable gains in intake velocity and combustion efficiency. Unlike disposable filters that degrade over time, this element can be cleaned and re-oiled dozens of times, making it both an economic and environmentally responsible choice for long-term vehicle ownership.

The 33-2031-2 serves a broad range of Nissan and Infiniti applications, making it ideal for fleet maintenance, restoration projects, and performance upgrades alike. Installation is straightforward—simply remove your factory air filter element and drop this in its place; no modifications or brackets required. Mechanics and DIY builders appreciate K&N filters because they deliver real-world results: cooler intake temperatures, quicker throttle response, and slightly improved fuel economy. At 0.96 lbs, the lightweight construction minimizes engine bay clutter while the durable red cotton frame resists collapse under high airflow conditions, ensuring consistent performance whether you're cruising city streets or pushing RPMs on the track.