We at SBC use the best from each manufacture such as LUK, SACH, VALIO, etc. . During the years each have had strong points. We take what is good and make it better if it can be done. Understand, Joe writes the Tech. Topics and also promotes and sells the Sach unit. Is he bias??. The 2001 disc is NOT the same as the earlier disc in fact anyone who has held it in their hands has said WOW!! A person you might ask is HeberRam or Bluechip. The disc is awsome!! The narrow lining actually creates more torque. Call me if your interested and I can explain in more detail. Do not worry, if you have not increased hp the system will last a long time on the 2001 trucks. Peter