Hi was fitting my Rcm gt spec headers to day and my old lambda sensor don't fit can some one let me no wear I can get one that will fit or can I just leave it off thanks

Car is a 95 wrx and will be having a map

 

You don't need to fit it in headers, blank it off.
Ideal is after turbo in downpipe

 

Ok my 100 cel sports cat downpipe don't have no wear for it mate