Supreme quality valve cover washers from Sickspeed This is a set of 4 washers and bolts. Will fit most any F series enging. Bolts are 11.06mm x 13.67mm, longer than many others out there. Washer diameter is 27.91mm (1.1") Made from weapons grade billet aluminum, these beauties are hard anodized for a lasting finish and LASER ETCHED so the logo will never rub off. Don't settle for silkscreen logos that fade and rub away over time. Don't forget to check out our other listings for parts and accessories to suit your ride. We are always expanding so keep an eye out for more supreme quality products from Sickspeed. Purchase includes a die-cut vinyl decal: Check out the manufacturer's website for more info and pics.