I bought my Carsound 94000 series CAT off ebay for 49 shipped. The 3" is going to be a little more expensive. The charge for 3" mandrel bent pipping is going to be different everywhere. I would say about 200 for pipping, plus 60 labor, plus the n1 can 50$, and say 70 bucks for the cat. Your looking at about high 300's for a custom 3" exhuast, as apposed to 700+ for a name brand.