This is the 3" Catco cat I always use. It's a 3 stage, stand alo…

This is the 3" Catco cat I always use. It's a 3 stage, stand alone cat with an air pipe to hook up to the air pump. No it's not stainless and no it's not highflow, but it's $40 and..... Newsflash ! 3" cats flow an awful lot more than 2" units.

Owner caption September 2005 · Photo 104 of 445