I was just wondering what size the thread/opening was on the Garrett GT series turbo's for the water inlet/outlet, specifically for a GT30. I'm ordering some earls barb fittings at the moment for the water housing and just wanted to make sure what the xact size is. Is the housing 3/8" just like all the other garrett turbo's?

I earlier had to modify a regular oil return flange to get it to work properly with the GT center cartridge. I just didn't want to run into anymore snags .

Thanks for any replies