FORGET THE LAND ROVER MANIFOLD STUDS THAT ARE MADE OF CHEESE. THESE ARE QUALITY MADE GERMAN 8.8 GRADE STUDS, IMPORTED TO THE UK, TO FIT THE LAND ROVER TD5. WURTH STUDS ARE WIDELY REGARDED AS THE BEST STEEL STUDS TO USE UNLESS YOU WANT TO SPEND SILLY MONEY AND JUST AS EFFECTIVE.