I was going to fit an rs turbo clutch to my zetec but when it came to fitting it, i noticed that the two different release bearings act on different parts of the clutch mechanisms. It was about this time last yr but if i remember rightly, using the escort gti release bearing looked like it would provide less leaverage because of it being a wider diameter but the rs turbo one wouldn't fit over the input shaft cover thingy????? In the end i gave up and fitted a brand new escort gti clutch and bearing then ordered a luvly uprated gti clutch thru helix.