I called a guy on an '86 F250 with a Hypermax turbo. He says his dad put it on there when the pickup was relatively new. He thinks '86/87. So would it be a old Hypermax system or the current pulse turbo system? Or is it to close to tell? Any drawbacks to the old one if that is what it is? I've heard nothing but good reviews of the newer pulse turbo system. I had to R&R one on a customer vehicle once to do head gaskets, so I know what it looks like and how it goes together, but I know nothing of the old systems. It's a pretty sharp old pickup. I might try to pedal my '06 and buy this one.