I have read good things about a product called Cataclean that says it removes carbon deposits from engine and catalytic convertors. Do you know anything about it and do you know where I could buy it? Thanks

Looks like a high-priced fuel system treatment. I’d just buy a bottle of Techron, if I had the urge. Are you trying to treat a problem?

Save your money…

Assuming you have no vested interest (a.k.a. spam) by posting a thread about this stuff, you can do a net search and this product should be the first thing to pop up.
The store locator for this rathole additive (which claims to “detoxify” the engine’s internal parts) is on the site.