4L80E, REMANUFACTURED HEAVY DUTY TORQUE CONVERTER, STOCK STALL, 13.75" DIAMETER, 11.5" BOLT CIRCLE, BILLET PISTON, 6 MOUNTING PADS, 1.703" PILOT, 2.65" HUB *FOR MORE A MORE DETAILED DESCRIPTION, PLEASE VISIT ONE OF OUR PRODUCT PAGES ON YOUR DESIRED SELLING PLATFORM!*