2,200 rpm stall. The 1058 is probably the 2nd most popular converter we sell at SunCoast. This torque converter can be used for both towing and racing. It is 200 RPM higher than factory and works well with almost all mild turbo setups, this even shines with the stock charger. With a stock charger, your vehicle will launch harder and, at part throttle, operate like a stock unit while driving normally. This converter will work with both 5 and 6-speed Allisons, alike.