Rear Stock Spoiler Question

[Gravy]

I've got a 92 GSX with the factory Spoiler on. I've worked on a 92 eclipse without one on, and there's a noticable weight difference between the two. Anyone have some numbers on the weight difference between the two of them? Or more importanly, how much the spoiler, and both side pieces weight?

Or is the weight difference for the rear wiper blade, arm and mechanism. If that's the case, i may switch over to the 1.8. I've never used the rear wiper.