running stage 2 is not recommended by cobb without a tbe and could (most likely) be harmful to your car when pushed hard (really high egt's). While I've never seen anyone running stage 2 w/o at least a downpipe, it would be interesting to see what is going on with the engine.
Have you done any datalogging while running the stage 2 map? If you love running stage 2 on your car without the proper equipment, I would love to see some datalogs if your up to it.
You should try downloading ecuexplorer from www.tari.co.za
and check to see what is going on if you are going to continue running the stage 2 map, since a tbe is recomended fo a reason.
(WARNING: This is NOT a pro-stage 2 without a downpipe reply, just interested in what is going on if he's going to keep running the stage 2 map, its his car and he can do what he wants with it