[Can a rear spoiler reduce exhaust fumes?]

i have a spoiler on my 280zx and have no fume problems. it definately creates downforce as the base mounts are starting to bend where they are bolted to the hatch.

[My S130 Project]

I saw that car at the 2006 zcon in Dallas. I believe it is a Kaminari air dam on the front. and if you notice, the front flares are from a z31