When the factory stamped out a flex plate for your 1994-2003 Ford equipped with the E40D or the 4R100, reliability was a concern for factory power levels, and constructed for an expected life of ownership. But, some of us either love the past, or can't let go of it, so we take extra care for our trucks. Where a thinner stamped material is prone to tearing, and eventual failure, CNC Fabrication stamped a 151 tooth factory flex plate replacement out of thicker material with precision balancing to ensure factory or slightly modified trucks can benefit from long term factory like experience and longevity.