If your classic Ford V8 engine is an all-out powerhouse, if you and your classic Ford do some pretty hardcore racing, or if your classic Ford engine has been otherwise highly modified for maximum output, then this is the ultimate starter you will need: The Ultra Torque Starter by PowerMaster! This particular starter has been specifically designed for high-torque and high-speed starting requirements. It has been optimized for starting up engines with an over 18:1 compression ratio and high-cranking speeds. 4.4:1 Gear Reduction Ratio Ideal for engines with OVER 18:1 Compression Ratio 2.5 KW and 3.4 HP output Machined aluminum adjustable block Water and corrosion resistant USA Made! Important Information about this Starter: If you're using an aftermarket bellhousing and/or adapter, always refer to the manufacturer's specifications and recommended starter. Please also be aware that upgrading your starter means that you must make sure your classic Ford's electrical system can handle the increased voltage requirements. PowerMaster recommends the minimum voltage required for this starter is 9.5 Volts, and some starter upgrades can demand up to 500 Amperes from the system. Please be sure to read the directions carefully when installing. NOTE: Please do not enlarge any holes or grind anything to make this unit fit.