Oil Filter Housing Thread Size

I am in the process of replacing my oil filter housing on my 91 VR4. My turbo oil feed line comes from this housing. Does anyone know what size the threads are where the plugs are installed. The fitting for the oil feed line is essentially frozen in the old housing and I will need a new one. Thanks

 

[iceman69510]

The large ones are 3/8 BSPT (british standard pipe tapered). The smaller ones are 1/8 bspt.

 

Thanks, I just wanted to make sure before I really messed something up!

 

Next question is, where do I find one that will fit?

 

[Barnes]

Does the fitting you need to replace look like this? http://www.roadraceengineering.com/instructions/oilline/oillineinstalled-2g.jpg

 

Not exactly like it, mine is an elbow. Is that one for an -4 AN hose? But it does screw into the oil filter housing there! Exactly where did you get that one?

 

[Barnes]

That is one that Road race engineering sells. You could probably call them and get just that fitting. I'm 95% sure it hooks up to a -4AN fitting.

 

Thanks, I was able to locate one at my local parts store.But iif it doesn't work out I will give them a call.