exhaust

[funnyman06]

On a 85 6.9 what is the OD on the Y pipe as it exits? im about to redo the exhaust and am trying to get my sizing all set up. Thx

 

[adam g]

I believe the pipes before the y are 2 1/4 and after the y 2 3/4 or 2 1/2 not sure thought.