The SACC system is a bolt-in unit. They send you a complete upper column. You remove yours and install theirs. Just ask Scott how many times the prototype column and associated parts were changed, altered or modified before he arrived at an installation he was happy with, that also minimized the modifications required to the car. That's what you're paying for, as well as brackets, hardware and clear instructions as to how to interface the electronics with the Pantera's. Unisteer also charges $170 for a variable assist module but that's part of the SACC kit. I can't imagine an EPAS installation without it.