K&N Replacement Air Filter DUC ST2 / ST3 / ST4 (97-'07) Model_Richa D3O Internal impact protection provided by

Internal impact protection provided by removable elbow and shoulder protectors

Great durability

making them last longer

the V2V antenna screws into the port on the back

K&N Replacement Air Filter DUC ST2 / ST3 / ST4 (97-'07) Model_Richa D3O Internal impact protection provided byK&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. Features: Designed to provide increased horsepower and torque. Pleated media provides a large filtration area offering long service intervals. Multiple