What exactly is the difference between the S and F VIN? Pictures?

[btsayles]

I was wondering if anyone could provide me with the exact components that an S VIN has for the EGR system with pictures that the F does not have. My truck is an S VIN but there is no EGR components on it. I was wondering if the previous owner switched the intake.

 

[Turbine Doc]

Just go to the 8th digit of your VIN for most, also on solenoid bank also you'll have 3 solenoids (S), or just one for (F), there are some odd ball F 2500s with EGR, but those also have 3 solenoids

 

[JMJNet]

F has a flat upper intake manifold.

S has some sort of widget (EGR Valve) on top of upper intake manifold.

 

[Turbine Doc]

Some pics of EGR "stuff/junk" photos from before running my Heath reflash and my ATT, IC is still in there as well