I'm running one on my 750. As others have said it is recommended to install them dry with milled gasket surfaces. Since my surfaces were not milled with a few light scratches I erred on the side of caution and used permatex copper coat. Ive had no issues in ~4000 miles, but I am not certain it was necessary, and I do not know what the results of installing one dry on non milled surfaces would be. To me gasgacinch would not be a suitable sealant for an mls gasket, if one were to decide a sealant was necessary.