I am looking to replace the clutch on my 99 4x4 5er ctd. There are several different makes and I don't know which one to choose. I was hoping some of you can tell me what you run and why along with experiences. I have a drag comp, 4" exhaust, stage one intake and will soon be installing a set of 275 injectors. Later I will be adding more goodies as money becomes available. I like the idea of converting to the 13" clutch. I will sometimes haul approx 10K lbs and do a lot of city driving. All suggestions are welcome, but please be specific about the advantages and disadvantages.