These unique covers add a touch of chrome to this area of the motor that was not possible in the past without plating your stock tappet blocks. Tappet covers are designed to fit over stock units, maintaining the original appearance. Each cover has a hidden slot in the back which permits it to be installed in minutes without removing your pushrods. Just lift the pushrod tube covers and slip them on. These covers are held in place with a small amount of silicone adhesive, which is included. Fits all Evolution Sportster 1986-1990. Sold in sets of 4 pieces.