Sorry if this has been covered before, I'm sure it has but I couldnt find it to save my life. I'm curious what I should do first. I want to eventually put both on the car but wanted to start out right. My old car could come with precats and when you installed a ypipe like our jpipe, the gains from the ypipe were lessened with the precats still on there. Price isnt really an issue since they are about the same, but I dont want to invest in both at the same time. Anyone have any thoughts about what to do first? Does it even matter? Does one increase sound or performance over another?