will an ITR throttle body fit the stock civic si intake manifold without modifications?

will having a bigger ITR throttle body improve performance on a turbocharged civic si?

 

All the ITR head is is a mildly p/p PR3 head-same as the B16A. So, yes it will bolt up-just make sure you get your Throttle body bored to match or it pretty much negates the mod. Also, the ITR mani will improve your top end, but you'll lose a little low-mid end torque.

 

oh, i mean will the ITR throttle body bolt on to my stock b16 intake manifold.

i have a turbocharged Si so i want to swap my stcok b16 throttle body to a bigger ITR throttle body so i wanted to know if i need to modify my stock intake manifold to fit the bigger ITR T/B or will it just bolt on with no modifications. just the throttle body not the whole head or intake manifold.

sorry for the confusion.

thanks

 

yes, it'll bolt right in.

 

The only thing to think about is, the ITR TB has a larger bore than the B16 IM. You probably won't get much gain, if any, and may even hamper your current performance.

 

It will bolt up but you should port-match your intake manifold to the throttle body.

 

you are correct.
i knwo a few who have swapped out their si stuff for itr stuff ..they gained a tiny bit up top but overall it hurt their performance..just stay stock or bore out the stock one.

 

Umm, what's the difference? It loses power because it is too big? I tink it's more of a tuning issue there.

 

should a dremel be used to portmatch? what tool if not that?