Hi, got a impreza sti 2004 with fmic, alcatek, gt spec headers, md321t and few months back was mapped for a cobra 3 inch turbo back system, if I change to a cobra track day middle and rear box would the car require a map tweak or would it be fine.? Cheers

 

Always worth getting things checked over at least when making a change after mapping

 

ideally get it checked to confirm or at least take a measurement of how much boost your making before/after the change. Changing out the center section and rear box shouldn't change things too much assuming the pipe diameter is the same though.