Tires grow forward.
If tire pressure were off from side to side and one got more traction it would try to pull that side harder, but most likely the tire is just balled up to the front side when leaving
procharger uses 91 oct for their test cars
MSRP -5896 for a system, 5196 for a tuner kit (no tuning)
JPC or any of the big shops can take care of you as well, Tommy@JPC posted some pricing a couple weeks ago