Two teeth up on the rear or maybe one down up front is what I was thinking, but I'll definitely wait until after the exhaust and flash because I may not feel the need at that time. Dano is who I plan on sending my ECU to for the flash if I can't find a reputable and trustworthy tuner locally for an in person tuning session on the dyno.Get the M4 headers with longer secondaries, flash your ECU (Dano’s did mine), and go up 2 teeth on the rear and power wheelies shall be easy
As for the M4 exhaust, I wish they sold their headers separately. If I go with them I'll have to modify the tail end to fit a different slip on because I don't care for the look of the angle/positioning of their muffler. It doesn't flow well, in my opinion. I prefer more of an angle upward in relation to the swingarm.