They have had an updated version for years. these don't use the old 3 bolt collectors, they use a ball and socket type of collector. The flanges on both the headers and the piece that bolts to the headers can be rotated to clear the driveshaft. Unless they have updated the header design, the driver's side will hit the oil cooler in a couple of places. This can make a vibration at idle that you can hear in the cab and drives me nuts. You need to fit the header to the head, install a couple of bolts hand tight, and mark the header. You can then take a ball pein hammer and using the ball, slightly dent the header to clearance it. IIRC, it's only the back tube that hits and is sort of easy to mark. If you get it to clear with no gasket, it will definately clear with the gasket installed and these are very thick gaskets. Sometimes you also need to notch the top of the passenger's side frame rail for the header to fit. If you have a c6 tranny, you will also need to cut the "ear" off of the passenger's side bellhousing in order for the header to fit. Also, you won't be able to use the factory exhaust or even install the headers with the front part of it installed. It sounds like a lot of work, but this is from experience.
