AIH delete

[cowboyupamrka]

Okay i got my gauges ready to install. i want to do the boost off the AIH placement. What exactly is the tread size for this? i have read both 22mm and 1/2" anyone got a sure answer?

Thanks

[Fullspeedjunky]

I have read in multiple places that it is a metric thread. 22mm sounds right, it is a big plug. Look around at some of the sponsor sites I think they sell the plug with adaptor for the boost fitting.

[vitalidle]

I thought I read somewhere that a cummins oil pan drain plug works. I will see what I can come up with for you.

[vitalidle]

Not 100 percent sure but what I found was any 22 mm oil drain plug works

[Fullspeedjunky]

get that then drill and tap it for the boost fitting