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Exhaust size help

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Stacks and car washes

Fuel mileage, is this normal?

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I am in the process of putting stacks on my 97 3500. I need to know what the stock exhaust pipe size is comming from the engine to the cat. It looks like 3" but I need to be sure before I cut into it and order parts.
 
stacks soon

MBurke



Let me know how yours turns out. Want to do the same but have to fit around 35 gal tank and over stock tank. (not much room between flatbed rails and fuel cell)
 
same problem....

I have a 50 gal in the bed and the stock 35 gal underneath. I am planning on running the drivers side under the front drive shaft over and back.

Anyone know of a good place online to get a good deal on 4" x 60" stacks, elbows, clamps and flexpipe???
 
MBurke,

Call Cummins,

they own Nelson Exhaust and filtration. Ask for a Nelson catalog,

60"x4" chrome stacks with curved top is part #89222c, straight is part # 89205c. They also have all the hardware you need ( plus you get the 10% discount if you have the power boosters membership from Cummins).

Garry.
 
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