Bought a 93 f250 non turbo not to long ago. dont know alot about diesels but trying to learn as much as possible. i know i like everything i learn about them. was wondering if putting a larger exhast would make that huge of a difference on this being non turbo. what is your alls experience with that. all do you know of any good exhaust systems for these motors.. i was thinking about welding up my own down tube. also running through the idea of stacks..what does every one think????????