Sorry James I should have been abit clearer.

If you look under your hood and see your headers on each side you will see an 02 sensor screwed in on each side,
What I'm trying to get made up is like a 'Y' Pipe bung that can screw into one of the existing bungs on the header and then being a 'Y'
design 2X 02 sensors can be screwed in, rather then welding another bung to fit another sensor.

John.