It has a header on it, I have no idea what brand. It seems to be the only mod the PO did besides Edelbrock shocks. I called around and was quoted $350 plus for a system with a new cat. Those quotes where with no name brand muffler/cat too, seemed like a lot, but it's been a long time since I needed one. I was hoping I could spend the same and buy a stainless set up to install myself. At least it would last for a long time. I like some of the aftermarket kits because the pipes are mandrel bent too, looks cleaner.