Even though this is the GB thread.. a quick picture of the Mazda6 V6 exhaust should clear up things:
7,8,9 and 10 are all Mazda6 oxygen sensor locations. 11 is the EGR tube if memory serves.
As you can see our y-pipe was designed by someone on a bad acid trip and probably drunk at the same time too. I doubt the Y-pipe with high-flow cat that Wagner is developing, will work with the Contour platform, but we really cannot speculate until Wagner gets a prototype out.
