I went the M11 route because I wanted to do it myself.I could have got a Camaro sub frame and had someone else put it in,but then I would have to pay them to do the job so there goes the savings.If a sub frame job is done correctly it is just as good as an aftermarket M11.Its just a matter of personal preference.Also if you get a sub frame you will probably have to rebuild it,so I dont think the cost difference is that much.