Hey guys! I am redoing the entire suspension on the car, and i am really leaning to getting the HT kit. Question is what spring are they using? Is it the Hyperco spring? I see on the ht website that they use Koni inserts, so i cannot see them cheaping out on the spring. Also, spring rates suggestions. I am gonna go with about 325# in front, but back i am thinkin of 300# as i have subs and amps in the back and i do alot of highway cruises with my local Pontiac club therefor i usually haul luggage and a full size spare.