of an improvement you noticed. Or, is it a gain only in horse power? I took it as if you spoke from experience in having driven your Z long enough prior to adding the pop charger to be able to be exact. Also, I have never considered changing anything from stock until I read your post. If it adds some pep and doesn't decrease my MPG's or if it adds pep and increases MpG's then i might be sold. Conversely, any decrease in mpg's and I am not interested. See what I am getting at?
