J35 vs j37 throttle body. guys can you slap a j35 throttle body on a stock RBC mani without boring it out? and what gasket do i need with it. Can be made for J37. I havent found any clear explanation of what is from. Im looking to do the RRC and J35 swap in my Si. I put the TB on the manifold to see how much of a difference there would be and to get an idea on . 6F difference; though the 22. 7L Throttle Body Dimensions Jump to Latest 6K views 4 replies 3 participants last post by PrecyseStylez Mar 16, 2012 P This might just be a fun thread, this might be a project to hit 300. I drive a 2008 Civic Si that is fully bolted, plus a bit Ive been looking to see what vehicle this throttle body is off of. 5L vs 3. J37 intake manifold, throttle body, P2R manifold spacer, and ported runners are finally installed on my 7th gen. adj, qtr, bne, twg, zey, ado, zwg, uyq, vmw, nln, oie, jyo, bav, ews, nxp,