I would like to buy some flanges that bolt up to the stock HT-18 turbo oil supply and drain. Since I want to run ss braided line I need -AN fittings (-4 or -6).

I found these at ATP turbo, they are for a t3/t4, will these fit a stock turbo?

http://www.atpturbo.com/Merchant2/me..._Code=ATP-FTG1

http://www.atpturbo.com/Merchant2/me..._Code=ATP-FTG1

 

Here is a site with a bunch of weld on bungs if you have access to a welder.
http://racepartsolutions.com/products.asp?cat=20

 

I'd prefer a bolt-on flange, but if I can't find any then I will weld something up.

 

Ok I've sourced a flange for the oil inlet but I can't seem to find one that will fit the turbo oil drain.

 

The oil drain is a T4 flange, so most T4 adapters will fit. The ATP adapters have been used before and do fit, but clearance with the stock turbo is tight so you need to be careful of which fittings you choose. You'll want to use an NPT fitting, not an AN fitting.

 

This thread talks all about it with sizes and pics.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/turbo-oil-passage-flanges-buy-them-where-507052/