Factory Effex (12-28228 TC4 Seat Cover with Bump Fits YZ450F 10-13 Specifically designed seat cover kit for today's 4-strokes; After years of R&D, FX has designed a seat cover kit with never before used seat technology The TC4 features original color matched rear panel, raised OEM logos and interlock stitching for long lasting wear & comes with all new Dura-Grip material that has integrated embossed top seat ribs that keep you positioned on the seat where you need to be Also included is the all new "Bump" that gives you even more grip and control with hassle free installation; Features Tri-density Soft-cell seat foam technology that keeps you positioned on the seat where you need to be The Bump also features 3-M adhesive that provides you the very best adhesion for easy, fast and accurate installation; No more cutting, sanding or filing