K&n Rc-5178 High-flow Oval Air Filter

The K&N RC-5178 Oval Universal High-Flow Air Filter is engineered for maximum performance and durability. Designed to fit a wide range of applications-including Ford F-250 Super Duty-this filter features a washable, reusable oiled cotton gauze media that delivers superior airflow while providing up to 99% filtration efficiency.

Built with an oval straight design and a flexible rubber base, the RC-5178 ensures a secure fit while absorbing vibrations. The flange can also stretch up to 1/16" (1.5 mm) for easy installation in between sizes. Pre-oiled and ready to use, it is backed by K&N's One-Year Limited Warranty and can last for the lifetime of your vehicle with proper care.

Ideal for high-performance applications, this filter allows your engine to breathe easier-improving throttle response, horsepower, and overall efficiency.


FITMENT:
2003-2005 Ford Excursion (Eddie Bauer, Limited, XLT, XLS) - V8 Air Filters (Universal Fit)
2003-2007 Ford F-250 / F-350 Super Duty (XL, XLT, Lariat, King Ranch, Harley-Davidson Edition) - V8 Air Filters (Universal Fit)

• Designed for Ford F-250 Super Duty & universal fitment

• High airflow with excellent filtration (up to 99% efficiency)

• Washable & reusable cotton gauze media

• Flexible rubber flange absorbs vibration for secure fit

• Pre-oiled and ready to install

• Oval straight shape with black powder-coated top

• Fits securely with a 3.688" (94 mm) offset flange

• Backed by K&N One-Year Limited Warranty

• ⚠️ Prop 65 Warning: Cancer & Reproductive Harm