When choosing a torque converter, buy the converter rated for how you use your vehicle: The Prowler series is for stock or modified trucks and suvs used for street legal driving. It's a stronger converter than stock, has triple disc lock up clutches and increases engine torque output by 5%. It's a good converter for towing and those who will limit engine performance mods to improved intakes, exhaust systems and mild chips/tuners/programmers without extreme or max performance settings. Our Eagle series torque converters are built for the demands of high performance, heavy load, heavy tow, and off road use.Eagle series converters multiply up to 40% more torque than stock converters and are built for maximum durability. The Eagle is an excellent torque converter for all applications and is a direct replacement for stock converters.For competition and special use applications optional custom stall speeds are available on Eagle series converters.