I bought two quiet inserts (lost one while riding) for my PC4 and the holes DID NOT line up with the thread on the can. I had to use a drill to open the hole up a little further, only then could I thread the bolt to the pipe. As far as tools are concerned, I threaded it by finger first then used an allen key, which I shortened by chopping the short bit in half with a Dremel. Whatever you do make sure you use the right loctite else you WILL lose the insert, sheeeit I learnt the hard way!!