see link Q45 90mm throttle bodies. seen this on ebay and made me wonder. Maybe this is how Z1 offer the larger throttle upgarde they use these ones would make sense.

 

http://cgi.ebay.co.uk/Infiniti-Q45-THROTTLE-BODY-90MM-300ZX-240SX-280ZX-/370492993605?pt=Motors_Car_Truck_Parts_Accessories&hash=item56431a7045

I very much doubt it mate. Stock is 50mm and they now use 58mm and that trust me is at it's extreme.

90mm yikes, theres not even 90mm of alloy to bolt it onto..

 

Years ago it was the Stanza but they took a fair bit of effort to make them fit.

I bored mine out and had new butterflys made, couldn't quite make 58mm though doing that though.

Oh and don't forget to port open the opening on the Plenum to match what ever you fit otherwise it would be a waste of time.

 

Smithy

I read somewhere 200 bodies fit? not sure if need to be fiddled with to fit and what power diff would make?

Bigger bodies wil make a difference,prolly not to noticeable if your running stock tubs but id expect a great improvement when coupled with other mods.Your torque would see the best increase.