the first one i used was on a new engine build and no filter, fair enough, o got a new turbo and filter, all primed up, as soon as i fired the engine up the shaft seized instantly, they then told me my car was running lean on tick over for my shaft to seize lol best excuse ive ever herad from a turbo company
3rd one i got off them though they knocked a little off but noth much i used for about 2 months and broke the car