K&N Replacement Air Filter DUC ST2 / ST3 / ST4 (97-'07) SIZE_18 It has an HH friction

It has an HH friction rating and performs better at higher temperatures than the AD compound

Low-profile shin bone pad that fits inside all boots

We have even included the opposite connector (main harness side) as we know these are often melted / corroded / defective and a major cause for repetitive electrical issues

horn and indicator switch

With everything from copper head gaskets to rocker box and carburetor gaskets

K&N Replacement Air Filter DUC ST2 / ST3 / ST4 (97-'07) SIZE_18 It has an HH frictionK&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