Scratching my head on this one, What I have(see attached SW) Is a y-pipe that goes from (2) 2" to a 2.5". That works great. Then I have that 2.5" make a S like shape up to 4". Soildworks just one do it, I keep getting errors. I have tried doing just a single arc and not the S still no go.

Any help would be greatly appreciated.

Mike