I have an opportunity to purchase a new Cobb access port, Invidia catless down pipe, and Invidia Q300 exhaust for around $1500. First of all, is this a good setup? I have read forum after forum and I am getting overwhelmed with info. What is the benefit between catless and catted down pipe? I am looking for performance, not a loud ricer-sounding car. Any help would be greatly appreciated. For those who do not know me, I have a 2012 STI hatchback. Gracias.