I just replaced he tensioner as the fai kit was only fitted 3000 miles before n the hassle of getting the whole thing swapped out would have cost me and fai wouldn't have helped in the cost. They dI'd buy me a new gm tensioner which I fitted myself so wasn't to bad but I'm now at a stage where I think I'm gonna do the whole balance chain kit again with gm. As iv done alot of work now n feel it may be ready