I have a 1980 F-250 with a 400 soon to be with long headers. Where can i find a true dual exhaust system for my truck? What is a good size exhaust pipe diameter?

Thanks
JM

 

Waste of time. Unless you are building the truck for track day, true duals are not going to help you, in fact they may actually make your truck slower. For something that old, you will probably be better off getting something custom built, I would doubt anyone offers anything that would work in your setup that would bolt on anyway.

 

I had true duals custom made for my F250 about 25 years ago. They are 2 1/4" I.D. with 45" long glasspacks. Yes , they do make a positive difference in performance and MPG. When it comes time for replacement, I will just get a Magnaflow and single exhaust pipe. It will flow just as well.