I bought two Skunk2 manifolds, to pick one and sell the other since I got them for a good deal. They are different though......Is one a fake?

Difference 1: The inside of one is smooth the other isnt? Does it make alot of difference? If it doesnt make a noticeable difference I dont care but if that means one is fake let me know.

Difference two: One has a stamp on it, the other doesnt.

Difference 3: The numbers that are inprinted are different letter styles, on one the 9 is regular written, the other the 9 is sort of stretched or something.....

Let me know anyone if one is a fake, how to tell apart, or if they are just different years and Im paranoid.......

 

i would stick with that one that has the rough insides too it. the intake manifold shouldn't be too smooth on the inside, needs to cause turbulance to mix air and fuel to burn nicely

 

Great thanks.

 

pics help a lot.