Job aint done with out your rubbers.......
yours is factory stat 60823 with rubber oring
no housing gasket is called out in TSB.
see snafu.
how to purchase parts
2 housings manifolds really ,1 shallow one 4mm deep.
deep uses only the oring to seal.
see tsb for details.
note parts are not upward compatible ,but are downward,see matrix chart on TSB.
very confusing.
but Suzuki was fickle sending out random intake manifolds,
so no cut off dates.. (none published anyway)
big time mess up here.