It's 475~525grams.. (16.755~18.518 oz)
It's printed on a label on the hood just to the left of the hood latch.
I just checked it on my 06 Spec SX (same beast but a 4 door).
Dave
Thanks Dave, I appreciate the response. I don't think the sticker is still on this one but I may have missed it. Changing the expansion valve today so the info will come in handy. Thanks again- Ryan