I installed, not a fan of the connector to the vacuum line by the master cylinder, it just doesn't have that "lock on" feeling over the end of vacuum line like OEM. I put liquid tape around the connection as I'm paranoid it would come off. The line is tad thicker than OEM, so very very tight fit over two tiny metal tubes on IWE, seems like they are putting undo stress on them, but have not had any issues to date. In hindsight, I would buy OEM because of how they connect to vacuum line and IWE tubes. Your mileage may vary.