Good evening. Seems like your the man to talk to about Zs. Do you do exhausts? I would like to have the flow master with cat backs put on my car. I can hold out till the beginning of spring since I'm putting the car away. Ideally I would like to get the Armytrix exhaust but I have to see about the finances over the winter. Hard to justify spending $5200 on an exhaust to the wife. Lol