Skull Enterprises 3315 Skull Motorcycle Derby Cover- Skull - Twin Cam - 5 Hole (Silver) Polished 319 Cast Aluminum Choose between 5 Hole for Twin Cam model year 1999 and up or 3 Hole for All Big Twin Aluminum Primaries or 4 Hole Sportsters or 6 Hole Sporters. Made in USA Compatable with Harley Davidson