the measurements are to make the headers fit in the engine room and with the torsion bars. I did use them but ended up with mounting the headers and cut the mounts in its pieces, make everything fit and welded them together again. For me there was no other option. No idea why. I tried more then 2 weeks on any other way than cutting. But it works and I have now 2000miles (a lot fast lane Autobahn ;-) ) w/o any probs or vibrations.