Bob's tune remaps your ECU to what you have on your Slingshot, and makes the most power with your setup. Advances the ignition, changes the pulse cycle of the injectors, and makes the most of what is there. I gained low end torque, mid range was suddenly crisp, and upper RPM it's a different machine. It is a little scary coming out of the turns hard now, which is just right. At 3,000 with traction control on in 1st gear, shoving your right foot down will spin until shift, but just enough. Turn traction control off, really need to watch 1st and 2nd hard hits. I had it try to do a 180 on me going to 2nd a few days after the tune. He charges $500, plus you either have to catch him at an event, or pay shipping both ways. He was at Maggie Valley in June, I got it done there. Also, there is a code I can hook you up with for $100 off, same price he charges for the tune at shows.
But without CAI, he said it's pretty worthless. Has to get air first. A bonus was an increase in MPG by 2-4, when I drive like I have some sense.
Here it is on Slingmods.
Polaris Slingshot ECM Tune / Reflash by MEFIBurn Tuning