Hi All,
A buddy of mine gave me the Riva RS13050 air intake filter, looking at the instructions it has a step for the Water box Block off that I don't see this part anywhere...

18. Install supplied water box block-off at open outlet on left water box using OE connecting coupler and hose clamps removed in Step 5.

Is this necessary? if so I will need to get this part then, any idea where I can get this or what can be used to replace this?

Thanks in advance