In this comparison between a stock Allison converter and Sun Coast’s 1074 (positioned weld to weld),

you can see how much deeper the front cover side is. Not only is this due to Sun Coast’s use of a thicker, billet front cover, but because more hardware is stored inside (i.e. triple disc). Beyond being larger, Sun Coast’s triple disc 1074 is also significantly heavier. In the case of the converter employed in L5P Duramax applications, it tips the scales between 75-80 pounds (vs. 65 pounds for the stocker).