The kit is intended for rocker covers of the type supplied by revington TR where the two holes for the nuts are LARGER than standard and the stud does not protrude through the rocker cover. This is because the Aluminium Rocker Cover is taller than a standard cover and the sleeve nut goes through the cover to engage the stud. If the holes in your rocker cover are sized to the studs, and the studs protrude, order kit RTR1075FK that contains enough parts for 4 and 6 cylinder engines. See below