stupid question???

[2005SUPERDUTY]

i have a 2005 f-350, im looking to straight pipe it, what size is the factory exhaust???

 

[powerboatr]

3.5" at the turbine outlet


my mbrp is 3.5 at the outlet
3.5 in the cat delete pipe and 4 at its exit

 

[JRJ04]

I believe the facory downpipe is 3in. and then it goes to 3.5 after there. anyone confirm this? This is how it was on my 7.3

 

[2005SUPERDUTY]

THANX FOR THE INFO GUYS, IT HAS FROM FACTORY 3.5 EXHAUST PIPE, THANX AGAIN