There are some pics in my gallery of the piped and cross member. Does this look like the issue you had? Nissan 370Z Forum - Zfish's Album: Zfish's Album

oh that thing, yeah mine hits that as well, determined thats the cause of alot of the vibration i hear, I would assume that pulling the cross member off, hammering the middle in a bit and re installing should allow some clearance.

My brother and I think that shimming the cross member bolts with some washers would probably fix the problem. I'm not quite ready to break out the hammer yet. :)

I installed mine yesterday and had the clearance issue. I had to leave the cross member off, any updates with your issue?

I wound up pulling the Y pipe back out, heating the front part just behind the flange, and flattening it with a peen. This gave about a pinkie's worth of clearance and solved the problem. It's been sounding sweet ever since. I had the advantage of doing this with my brother who works at a muffler shop though.