Twin Power Clutch Kit For Harley Big Twin / Sportster Features: Big Twin clutch kits come with Kevlar friction plates, with a starburst groove pattern for maximum heat dissipation and oil circulation All of the clutch plates are manufactured from high tempered American steel 6 tempered steel plates 8 Kevlar friction plates Pre-set clutch pack height (stock spec) for easy installation Must re-use OEM double riveted steel plate Made in the USA