The J-six is designed using progressive bore sizing, with the smallest bore in the lead-in position. This differential progressive bore sizing is critical for heat distribution and pad wear. This also gives optimum lever feel and brake response. Jaybrake’s J-six calipers are designed to mount directly onto Harley front forks (except Springers) without having to change the brake lines. The J-Six MSRP in a polish finish is $429.95. See the whole Jaybrake lineup at www.jbrake.com and call on the company at (716) 592-0554.