General question to all I got a 2004 wrx impreza I wanna kno what size plug do I need to block the top mount stock bov hole.

29 or 30mm i think

Where are you putting the BOV if you're blocking off the hole?

i think he means hes trying to plug the hose!! and make it atmo

I've got a hks super sequnetial jm not usuing te bracket mount but I lost the plug so I was wondering what size it was.

You got the stock bov wen I remove it there will b a hole where the mount is. cause the hose is connected to the stock bov I don't wanna block the hose cause I'll be using it.

i'm confused, i was refering to the plumb back hose plug when installing an atmo bov

Ahh yes the plumb back hose.. I thought you were referring to the actual hole on the TMIC!

Anyway, GFB make a plug which fits in there perfectly (as thats what its designed for, to block the plumb back hose when you're running an atmo BOV).

http://www.gfb.com.au/adaptors/hose-plug

Hose size is 29mm.

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i think hes got a universal ssqv and he doesnt have a adaptor for the bov so hes going to use the plumb back hose and wants to block off the top mount hole =/ just buy an adaptor and block the hose mate