Howdy- I researched the heck out of this a few years ago, if I recall aftermarket seats disrupted the proper function of the seat belt system in a crash. We took ours to a savvy upholstery shop, they upgraded the foam and added some where we requested. We actually got to sit in mock ups as they worked their magic. They went from a 2 to a 8. and we dont have to worry about the belt function. Kept the original upholstery, and only cost less than $200.