Heavy duty torque converter for AODE / 4R70W transmissions. This converter has a larger than stock Luk clutch. Good up to 400 horse power. Same as the #13 converter but 11 3/4 inches. This converter has a smaller bolt circle than #13, they will not interchange unless you change the flexplate. Fits higher performance 4.6 liter motors in some Mustangs and police cars. 2500 or 2800 stall speed.