ok im installing a new turbo on my fc and it has a -10an line on the oil return so I need to install an oil drain flange on the front cover with an An fitting so I can screw the SS line on ... my problem is how do I know what size the flange needs to be ?? I added a pic to clarify what I need if any one can tell me what one to purchase so t fits on my s4 TII front cover

http://cgi.ebay.com/ebaymotors/BILLE...ht_1791wt_1167

 

same size as the drain tube on the turbo, just the bolt holes have to be dremeled ever so slightly. basically a typical T3/T4 flange turbo drain fitting.

same fitting you linked, just needs to be modified a tiny bit because the bolt holes are slightly off. like 2mm off.

 

you can also cut the tube off the stock one and get a weld fitting for it.

http://www.jegs.com/i/JEGS/555/15264/10002/-1

 

thanks guys