Ebay cats. PDM cats. Catco cats. All have flanges. In fact, the only catalytic convertor I know of is Random Technologies, and I wouldn't touch one. Heard too many issues with them. And if a weld-in part fails.. it sucks for you.And you're right. I didn't know you were talking labor only. But with the owner sourcing and buying parts, and then labor, I bet it would still be over $100 .-JeffWDRacing wrote:Well most high flow cats are weld in, so you only need one flange.