Exhaust upgrade

[macs94]

I have a 99 f 350 crew cab duallie that i want to upgrade my exhaust. Mileage is my main priority, power and a more agressive sound would be cool.Any suggestions or recommendations on size and manufacturer would be appreciated thanks Scott.

[dereku]

any 4" pipe should be fine. Removing the cat is cool too for milage concerns. But if your gonna have alot of performace stuff on it in the future I would look into a 5". Not to mention if you take out the muffler it will sound really good to

[SMKSTAX]

4" turbo back, no cat or muffler. Check out farmboysdiesel on the main forums page for good deals.

[strokin_early_99]

Look into a 4", the 5" is for sound, it has nothing to do with performance down the road. Everyone thinks that 5" is better for high HP. I make a fair bit of power and I use a 3.5" down pipe to a 4" exhuast.

[farmboysdiesel]

Let me know if I can answer any questions.