Wilwood's Gen II Sprint inboard hub & adapter kit provides a basis to provide dynamic rotor mounting of either standard 6 x 5.50" or 8 x 7.00" bolt pattern rotors. Hub & adapter kits contain: rotor adapter and dynamic rotor mounting bolt kit. Manufactured from high strength aluminum, it provides a lightweight and strong solution for rotor mounting. Gen II hubs offer improved clearance and easier install due to widening of the rotor adapter attachment bolt spacing. Also new high strength T-nuts and bolts round out this complete assembly.