Called and spoke with their parts dept about the 4" lift for the 2021's. The front is the Readylift SST kit from 2020 and the back is a customer made spacer that they make in house. Also the install tech sent me pics of how they need to trim underneath to get 35x12.5 to fit if anyone wants the pics just let me know and I will post them.
The full kit costs $1,434.31 and they have 7 in stock
The full kit costs $1,434.31 and they have 7 in stock