Universal air filter details
K&N Filters Universal Clamp-On Air Filter – 2.75" FLG x 3.5" T – Round Tapered (KNNRU-5135)
The K&N Filters Universal Clamp-On Air Filter – 2.75" FLG x 3.5" T – Round Tapered (KNNRU-5135) is designed for high airflow and excellent filtration in custom and universal intake applications. This round tapered filter features a 2.75-inch inlet and a 3.5-inch top outer diameter, making it suitable for a wide variety of performance and replacement setups. Built with a durable rubber flange and washable cotton gauze filter media, it provides reusability and reliability over time. Ideal for enthusiasts looking to upgrade airflow in tight engine bays or non-OEM builds.
Features and Specifications:
Flange Inside Diameter: 2.75 in (70 mm)
Base Outside Diameter: 5.063 in (129 mm)
Top Outside Diameter: 3.5 in (89 mm)
Height: 4.438 in (113 mm)
Engineered Performance: Designed to boost horsepower, acceleration, and overall engine efficiency.
Advanced Filtration: Features four layers of premium cotton gauze for superior contaminant blocking.
Durable Build: Constructed with rugged, high-quality materials for long-lasting use.
Low Maintenance: Requires cleaning only every 75,000 miles under normal highway conditions.
Easy Installation: Pre-oiled and ready to install for quick performance gains.
Universal Fit: Compatible with a wide range of applications.
Eco-Friendly: Reusable design helps reduce landfill waste from disposable filters.
Product identification
- Brand: K&N Filters
- Model / MPN: KNNRU-5135




