Nope, ever heard the term if it aint broke don't fix it lol. Well, I have had an entire stm qsc clutch setup sitting on the shelf and I refuse to mess with it because I have had zero problems with the stock setup. The Stock primary is the best one you can use for desert racing since it draws in the most air. Really the only advantages I have heard of for a different clutch is that I grabs harder but holeshots are less important than constant long engagement of the clutch. Well 99% of the clutch problems people have especially in desert racing is the belt heating up because its staying in one spot for an extended period of time. The heat from the sheaves transfers over to the belt and bam blown belt. So we are running a temp gauge and keeping on eye on the belt temp which stays decently cool since we cut a hole in the side of the clutch cover over the secondary for a second intake and wrapped the header. We are also not running any plastics under the driver's seat. That's just my experience and what is working for me.