Saw the post and thought I would add based on some exp. now. Put the 2.9 whipple blower on my 2015, stage 2, I did upgrade the driveshaft to the 1 piece alum. Driveshaft shop. And the half shafts. I did not do anything to pistons, shop here in FL uses an amazing tuner (the tune is critical) but 3 days of full research determined the whipple tune is actually
very good. It put down 691 at the tires 2 pulls back to back. He said the factory pistons should do just fine and after many WOT pulls no issues and to my surprise the stock clutch in my 2015 track pack even at 690 hp is actually holding up just fine. I'll get a Mccloud when it's time but just an update no issues at all and since crank is forged should last a while.