I know the TypeR has a single-port intake manifold, so what does a GSR have exactly and what's the difference?
I'm sorry if this question has been asked before but i couldn't find anything on this subject using search

thanks

 

the gsr im has a secondary runner that houses butterflies that open up when vtec fully engages. itr im will not just striaght bolt up to gsr's

 

The design of the GSR IM give you better mid-range, but the ITR IM will give you better high end power!!