I haven't had much luck searching for an answer to my question:
Will a s4 turbo II throttle body work as an upgrade to a gsl-se or would I have to stick to using the throttle body from an NA?

 

i dont beleive that the tb it self will fit but you can u install the s4 upper and lower intake which in turn will give you what you want

 

Voltage is different on the 2nd gen TBs, neither will work.

 

you mean air flow meters i think?

 

Yes,

 

So can anyone verify the t2 throttle body will not fit? I know the NA units will.

 

really? i thought it didnt? um turbo might be better, cause the NA is upside down in comparison the the gsl-se and turbo

 

Ok maybe I was misinformed in my readings. When searching on this a couple weeks ago there were several posts where people mentioned they had performed the s4 tb swap on their se's. Supposedly they flow over 30% more than the small se tb. Some mentioned the tb + s4 upper intake was an even better option since it flowed more as well.
There was no mention of the t2 units however. If someone in the know could enlighten the rest of us it would be appreciated. I'll admit I'm clueless

 

the TB will not fit an S3, you have to use the whole intake. I got an S5 intake when i was thinking about doing this upgrade... but i decided just to get a s4 or s5 13bt, also you would have to use an s4 TB.

 

Cool thanks for the response. So the turbo 2 throttle body will not work. Does that also rule out the s4 NA throttle body?

 

They are basically the exact same thing except one is mounted upside down. Which one depends on your perspective.

 

You can only use the S4 Throttle bodies with the S4 upper and lower manifolds. The throttle body will not fit on the SE plenum and no you cannot just bolt on the upper S4 manifold to the lower SE manifold.

 

https://www.rx7club.com/1st-gen-archive-71/got-se-you-gotta-do-mod-169237/?pp=15