Hi guys i was just wondering if the factory secondary 850cc would fit into the factory primary fuel rail without doing any alteration to it at all. The reason i'm asking is becuase i just bought the 1300cc for my secondary from JPtoLA and he ask if i was going to use it for the primary and i said i don't know if i can without doing any alteration to the fuel rail and besides it would be great too since i'll be having two sets of 850cc laying around for nothing. So thanks alot guys for your support

 

The primary rail needs to be milled down a little bit for it to work.