on silver alloy if i went like a month without cleaning in the winter i would get a bit of discoloration but not as fast as you do. Just detailed the Z and drove it two days in a row and i got nothing on the back bumper at all. Definitely running rich i wouldnt think if you just draped the micro over the pipes that it would be that much of a problem could be wrong though never tried it.

 

I guess I'm coming off making it sound like the entire bumper is black or something, the next day. It's not. You can't really tell the bumper is dirty or anything. It's more like a very faint dusting that you can only feel. We're not talking a layer of noticeable grime here.

It's all relative, I suppose. I'm just too ****.

 

hmm kninda concerns me.

i have a PPW with test pipes. getting alot of discolortaion in about 1 week?

but i just installed them. is this because maybe they are new?

also i have no tuned yet.