Dome nut and washer kit
Product number:
21679
chromed. Securing rocker covers and cylinder heads
Product Information "Dome nut and washer kit"
Jaguar: XJ12 Series III from engine no. 7P47587 (1983-92) ? XJS 5.3 V12 from engine no. 8S24175 (1983-93)
chromed. Securing rocker covers and cylinder heads
Often the original cap nuts are damaged from opening. A single replacement creates an inconsistent appearance. But that's not the only reason to change nuts. Modern materials transmit higher forces on the flanks, the threads are stronger.