Join Date: Sep 2009
Location: BC Canada
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I think it depends on what you have installed now. It is my understanding that there are two types of up pipe. Some have a little scoop inside to drive more exhaust into the egr cooler and some do not. Mine did not have the scoop so the restriction should be negligible. I just left it and welded up both ends of the egr cooler. My cooler is also the 03 tube type cooler. I have heard the newer ones have more coolant restriction??? I don't know.
Also I am told the bellows on the stock up pipes can be prone to failure. I just took the risk and left it.
I didn't measure the size though. Sorry.
2003 Ford F-350 King Ranch Crew Cab Short Box, 6.0L Powerstroke, DashDAQ, custom rear diff cover, DIY egr delete, air cleaner, fumoto drain valve, DIY coolant filter, JVC NX7000 Nav system Sirius/Bluetooth, remote start/alarm, spray in box liner, DIY Britebox and custom power feed, DIY High Idle, big HFCM drain plug,
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