Contour Enthusiasts Group Archives Forums Modifications Duratec Performance SVT Cat vs SE Cat.

Let me also say that the stock cat has a nice 3" opening ( perfect match for 3" collector on MSDS Y or if you modify your stock Y). The inside looks virtually the same as a Catco 3" which I bout but decide not to install as it looked the same when I had it all apart. Unless you are going to a trick metal matric cat or something I dont think any ceramic brick aftermarket cats are likly to be better than stock. Probably is a gain going to straight pipe (but not gutting cat).