hi all im building a 04-06 r1 engined locost and was going to make my manifold but ive been offered a busa manifold at a good price does anyone know how close a match they are i dont mind modifying it a bit but dont want to buy it then it be no use to me i know the primaries on the busa manifold have a 38mm i/d does anyone know if the r1 manifolds are the same cheers adam