Description
The K&N Engineering RU-1390 is a versatile universal air filter designed to fit a wide range of applications including racing vehicles, generators, snowmobiles, tractors, and radio-controlled cars. Crafted with durable molded pliable rubber flanges, this filter absorbs vibrations and ensures a secure attachment while allowing for slight stretches up to 1/16 inch to accommodate various intake sizes. Its oval shape and angled design make it suitable for installations where space constraints or specific airflow directions are required.
The filter’s construction emphasizes reusability and ease of maintenance. Being washable, it can be cleaned and reused multiple times, providing a cost-effective and environmentally friendly solution for different mechanical and automotive needs. The high-quality materials ensure long-lasting performance, even in demanding conditions.
Designed with a 4.5-inch length, 3.75-inch width, and 7-inch height, the RU-1390 offers a reliable fit for many custom and stock setups. Its 20-degree angle feature allows for versatile orientation, making it ideal for complex engine bay configurations or custom applications. This universal filter is built to meet various needs, from high-performance racing to routine engine maintenance, ensuring optimal airflow and engine efficiency while maintaining a tight seal during operation.
Features:
- Universal oval-shaped design suitable for diverse applications including racing, generators, and remote control vehicles
- Constructed with ultra-strong molded pliable rubber flanges for vibration absorption and secure attachment
- Stretchable flange material allows for up to 1/16 inch (1.5mm) size adjustment for a perfect fit
- Washable and reusable for a cost-effective, eco-friendly maintenance cycle
- Designed with a 20-degree angle for flexible installation in tight or complex spaces



















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