The Kuryakyn 8389 tappet block accent cover is so clean and so simple! Nothing could be easier than to add this cover to your exposed engine case. Its chrome style accents the stock tappet blocks and makes a big difference. Includes (1) Tappet Accent, (1) Hardware Kit, including: (1) 10-24 x 1/2" Button Socket Cap Screw, (1) Bracket, (8) 1/4" Hot Spots, (8) Hollow Point Sleeves; Suggested tools for installation (not included): Set of hex wrenches, inch pound (in. lbs.) torque wrench with hex bits. Compatible with Harley-Davidson models: 1999-2017 Harley-Davidson Twin Cam motorcycles.