Quote Originally Posted by JeepsAndGuns View Post
Wow, thats a pretty significant difference between trucks with the same engine.
If they have the same engine, and basicly the same truck, why not make them both have the same exhaust to cut down on production costs? Thos 1/2 ton pipes are tiny!
My guess is the needed to get the cats to light off quicker in the 1/2 tons for emissions reasons. Some of the early 1/2 ton Express models had the 3/4 ton exhaust size setup.