ya, that exhaust on ebay looks pretty good... But 20 horsepower? I'd be surprised to see a 10 hp increase on the S/C version, and maybe a 5 on the N/A. But anyway, I'm sure that with a 2.3" pulley and that intake you could probably pull off 50 horses, which is what I plan to do.
But anyway, that intake looks good, mostly because all the piping (from what i can see) is metal. From what I hear, plastic piping isn't so good for an intake because it bends in on itself under alot of pressure (which makes sense), especially for a S/C engine that WILL be producing alot of vacuum. Now I'm seriously considering to bid on that thing...