I jave a jdm Integrs Si, does anyone know if a typeR ECu will work in the Si/GSR, i know the inlet manifolds are different, will this make a difference in that the Si manifold wont open its secondary runners at 6000rpm as the type R ECU wont recognise the sensor from it????

 

A GSR motor with a stock intake manifold should not be run with an ITR ECU, as the secondary butterflies are no longer controlled.

 

thanks..thats what i thought...just one more question, is the header on the ITR the same as the Si, (i know where theres a crashed ITR and was thinking of changing headers, or would i be better to go for a DC or comptech header?

 

I dont think you want a USDM ITR header, more like the JDM 4-1's