Allstar ALL26908 12" Diameter Torque Converter Torque converter fits GM th350/400 transmissions and has a 12 inch diameter which products a 2,000-2,200 rpm stall speed Bolt circle is 10-3/4 inch ideal for mild performance applications, including moderate drag racing, factory and street stocks Allstar performance economical torque converters are completely remanufactured with new pump drive hubs and thrust washers Exact stall speeds will vary depending upon displacement, torque and vehicle weight Sold each