after the conversion, we didnt realise until the other day when i broke a o2 sensor.(and it came out again today when i planted my foot)
It hits firmly against the engine crossmember, using the standard ej22 headers and standard l-series xmember.
has anyone come across this before? and what have you done to rectify the problem?( i just scalloped a nice chunk out of the xmember)
heres a pic so you can understand what im saying better.

thanks
alex