Im telling you that as a fact this fin is not like the others. My digital camera is not working right, or maybe me, or I would try to post a pic. One fin does not look like the rest. I have a tourqe enhanser from Halsey Machine and have no proplems with the turbo working. Wondering if this was done to balance this or was a Monday mourning when it was built. My second post related to the down pipe that would not match this Magflow system and made me start wondering about this. I bought this Truck new and it is my first diesel. Still does not seem right. I have not herd a harmonic vibration. I get up to 20 lbs boost and some and it still wants to go. need the clutch thing but getting started with bombs. any advice is apreciated.