Yes it's one of the best suspension kits you can buy for the Mustang. Don't buy it off the FP website though, you can get it cheaper at other places.
Just as an example it's $1208 here at Levittown Ford: https://www.levittownfordparts.com/sku/m-fr3a-m8a.html
The Mach-E is NOT a Mustang, I don't care how Ford tries to market it to hipsters and environuts to move more units. You might as well call a Chevy Volt a Camaro. The Mustang is a 2-door coupe, a pony car.