i took my truck apart yesterday and to my suprise it has a 12. 25 inch luk clutch in it. i thought maybe it had already been changed. i called luk and they looked up the numbers and said it was original. i called dodge and was told the same thing. i would like to know what you think of this peice of information. i always did like luk clutches. they were good on fords to replace the dual mass flywheel. so i am gonna go with a luk 13 inch clutch with flywheel. and an organic disc. 540. 00 complete delievered.