Quick mock up in paint, ATM, we run a different manifold to retain the heater box's (air cooled motor), as we dont want to ditch the heater, i need to track down some other manifolds that exit (as seen in paint pic). It could be done a lot easyier if i bought "extractor manifolds" but the heater box's must stay.
So, as you can see when i track down due exit ones (3.0lt ones) they will have a duel exit to use the "cross over pipe" It's hard to explain unless u have seen the porsche heater box's off the manifolds. in theory u could cut an shut the ones on there, but thats a bit of work