Dee-Flektor Filter

The K&N Dee-Flektor Filter is a push-in breather element engineered for engine crankcase ventilation systems in tactical and performance vehicles. Designed for operators and enthusiasts who demand reliable airflow management under demanding conditions, this reusable filter addresses moisture ingestion and contamination in PCV (positive crankcase ventilation) systems. The half-shielded design protects against splash-back while maintaining efficient evacuation of blow-by gases, making it essential for extended operations where engine longevity directly impacts mission reliability.

Constructed from durable rubber and steel components with a chrome-accented finish, the Dee-Flektor Filter features a 1-1/4 inch hole opening compatible with standard crankcase vent ports. The round, half-shielded configuration deflects moisture and particulates while permitting unobstructed gas escape—critical for maintaining proper crankcase pressure and preventing seal degradation during high-stress driving scenarios. K&N's reusable construction eliminates disposable filter waste and delivers long-term cost efficiency; the filter can be cleaned and reinstalled repeatedly without performance loss, a standard advantage of K&N's engineering philosophy in high-performance applications.

This breather is ideal for vehicle operators, mechanics, and fleet managers seeking to extend engine service intervals and reduce maintenance-related downtime. Installation is straightforward—the push-in design requires no threads, hose clamps, or adapters on compatible 1-1/4 inch vent ports. Users should verify port diameter before purchase and ensure the filter sits flush to prevent vacuum leaks. Regular inspection and cleaning with compressed air maintain optimal flow rates and prevent clogging from extended use in dusty or contaminated environments common to tactical and field operations.