My Z isn't lowered but I still scratched my front bumper on my Blitz ramp. So, I made a wooden step(I am still working on it) and it works pretty good. I don't think I want to spend 200-400 dollars on race ramp though I'm sure they are worth the money. My
BlitZ ramp cost me $30 (or even less) from Pepboys 4 years ago!
Take a look:
DIY: Nissan 370Z Oil change (AK370Z way) Pictures inside
Width of the wood: 1.5"
Video: