K&N 10-11 Triumph Thunderbird Oval Replacement Air FilterK&N's high flow air filters are available as a replacement for your stock motorcycle air filter element. They are custom engineered to fit your specific application and are designed to provide low restriction and increased performance, while providing excellent engine protection for your motorcycle. This Part Fits: Year Make Model Submodel 2010 2014 Triumph Thunderbird Base 2011 Triumph Thunderbird 1700 Base 2010 2013 Triumph Thunderbird ABS Base 2011