700R4 / 4L60E input clutch drum with 8 Super Size 6 inch clutches. A stock input drum is only large enough to hold a 5 3/4 inch clutch plate. The high performance Kevlar impregnated friction clutches are 25% thicker than a stock full thickness clutch plates and uses .060" steels. This is a full 82% larger clutch apply area compared to a stock 6 clutch drum. It has a Super Size 138 1/4 square inches of clutch apply area. This is equal to 11 stock size clutches. Even 9 thin red clutches used with 9 thin steels will only have a 50% larger apply area compared to stock and will not dissipate the heat. This input shaft and drum is sold with the 3-4 Super Size clutches and steels. It comes with a non-LS1 type input shaft, but can be converted. pics here