Compound turbo hot pipe 3" or 3.5"?

[gwhammy]

I have used schedule 40 three inch 90's and schedule 10 stainless 90's. The schedule 10 can be pressed out into a rectangle to fit the flange. You can weld the stainless with standard wire to the flange.

 

[superdutyfarmer]

That picture is pretty much exactly how mine is gonna look, I started doing some measuring and eyeballing before I pull the motor so hopefully I can make all the brackets on the engine stand before it goes back in. Thank you very much for posting that