@Shivers:
Front:19x8 +30mm (19lbs)
Rear: 19x8.5 +33mm (21lbs)
I was planning to use them to mount all my extra 245/40/19 tires on since my fronts never wear down as fast as my rears. The front apparently looks good as is, while the rear could use a 20mm spacer if you are putting these on a 370Z.
@critical:
I'm not at home for another 2 weeks, but here's an online pic that shows the design well. It has a large resonator built into the junction which helps to control the tone vs an unresonated y-pipe. Weight is roughly 12 lbs.
And there's a crappy image I took with my phone when I first got it. My old cell got a lot of scratches on the lens. I can take better pics when I get home and get it off the car.