1959-1974 Rover Custom Round Race Filter Length 6.56in Width 6.31in Height 2.25in (KNN56-9335)Breathe easy and boost performance with the Universal 1959 1974 Rover Custom Round Race Filter Length 6. 56in Width 6. 31in Height 2. 25in from K&N. This high flow replacement air filter is designed to increase horsepower and acceleration while providing outstanding filtration. Unlike disposable paper filters, K&N filters are washable and reusable so you buy once and never worry about replacements again. Features Washable and reusable designed to last