Keep in mind guys and gals that the 2005-up Big dogs run a totally different primary and transmission from that of the pre 2005. The primary is actually longer, does not have an inner bearing like the standard H-D style, and the transmission is a DSSC (Drop starter slam clutch) not at all the same as the normal RSD. So, the only primary that will work for the 2005-up is Baker and Karata. I would go with a Baker. Baker is less $$ and comes with an outer bearing support, making it a more reliable option than that of the original primary. Giving that extra bearing support, the transmission bearings will last a lot longer. Plus, Baker comes with a full warranty, looks great, and bolts right up with no machining needed.:2thumbs: