I am in a predicament as of now. I am wanting to add a CAI to my GP, but I don't know what one to get. My budget is 200 or less. K&N has their 57 series for ~$250, ZZP has one for $189, I could buy an unused ZZP one for $150 shipped from someone on here, or make my own. What do you experts think I should do? I am sorry if there is another thread for this.