My gt17 turbo needs a feed adapter for my -4an oil line. I went to home depot and took the factory banjo bolt off the turbo with me. The closet thread I could the bolt fit was fine was a 5/16. No luck on getting a adapter to fit the oil line though. I found a fitting online that specifies being for older gt model turbos, a 7/16 to -4an inverted flare.

Would this fit in my turbo?

 

its about 2/16 off.........

 

:1