sorry took so long to get back to you , I bought all my parts from matt lewis and was going to get the mahles and he was getting the cut outs done for me but who ever it was doing the job damaged one (think it fell and cracked or something along those lines, so I did not want to wait any longer and said the wisco ones are just as good so I went for them and got them quicker , as for them lasting 100k I would be well happy with that it would need rebuild by then anyway lol
to look at them ie the finsh of them it looks great and comes with an info sheet telling you what the bore should be and I gave that the machine shop and they seemed to like them and said there good