Searched how my looking under your bed? Their are eleven billionty posts. I'm sure a ton in the archives. Yes this pipe has been around for ages.
Post I made last week: When the SHO Shop y-pipe came out it was all the rage. Everyone loved them. I don't know where this other information is coming from. I had a catless SHO Shop Y on my SHO and I did lose power down low to make up for it on the top end. I really missed the low end and hated the sound so I sold it. I know this is isn't a Duratec but I would have sold the SHO Y if I didn't think it helped. Best SOTP power over any mod I've ever performed. These are just my findings. No way grinding out some metal on the stock Y is going to do what a nice mandrel bent Y is going to do.
I gained 9 hp on the dyno with my car. Why starjammer you are dumping $ into as ATX and such an old car is not to bright IMO. At your age I'm sure there are a million more important things so blow the $ on.

Please don't pull a Hector.