I am informed by my glass co that this is not OEM Porsche glass. The rubber seal is glued in, not in the track. I am having it replaced shortly, with OEM Porsche glass. As anyone who drives regularly on Mass roads gravel truck drive with no covers spewing little missiles. I go through 3 windshields/year easy, though this is the first for the 911. There is no recourse to the trucking co, but glass coverage is part of auto in Mass. It is a very lucrative business for glass installers