06 civic si coupe transmission compatible with 05 rsx type s manshaft

Hi hopefully i can get an answer as soon as i can. Im rebuilding my 06 civic si coupe transmission and all i need is a mainshaft. I couldnt find it anywhere, i found a mainshaft from a 2005 rsx type s. Im wondering if i can use the mainshaft from there and use it for my civic? Any fitment issues??? Thanks