I would recommend the HR bar myself
The hardest thing to believe with our setup is that it works equally excellent on the street AND the track. It was hard for us to believe it as well, so I can imagine for you guys. We anticipated some trade-off on street characteristics when designing & testing our setup. We quickly found out that because of how it is mounted and designed, it worked quiet & effective on the street, without being too stiff or over-effective. The same setup works on a 14 sec daily driver with stock suspension parts, and also an 8 sec all-out race car with aftermarket suspension components, with or without a front swaybar. Our latest meet (Buick Nat's) confirmed this several times, as we heard it first hand from recent customers using them.
I am about to go to a money back guarantee with these. We have close to 200 out there already, and would have more if we could get them together faster. Of those out there, we have only had 1 person contact us with a complaint. His issue was that it worked too good! He went .03 faster on the 60 ft, .05 faster 1/4 mile, straighter, and launched like a pro-stocker. Get this, he missed the adreneline rush of the twisting & wondering which way it was going to go, and though it was too mellow & controlled now. I can understand, it is very exciting trying to keep it going straight & not take out the guardrail or x-mas tree
As for air-bags, they are really only a necessity for tire clearance issues. They can be used as a tuning tool from track to track, depending on how each car hooks up. We learned something VERY interesting at the Nat's. On the top qualifier in TSM (Dave England, gold T-Type), he put the bags in to get it to handle better at high speeds. This would be very similar to anyone doing it for tire clearance. He ran even pressures (recommended) from around 4 to 12 to get it safe. At 8 & 12 psi, the rear got firm and started to bounce off the launch. We make airbag spacers that are used to reduce airbag pressures and lose the bounce, while keeping the same height/downforce on the rear. We originally thought they were needed on 17-20 psi & higher. We found that even on 8 psi, it takes the bounce out. It launched the hardest & went the fastest (9.85 est, see thread on 9.45 TSM car in lounge)) with the spacers in & bags at 1 psi (basically empty). More A-body cars use the bags, with 5-10 psi equally. We recommend using them, and having the absolute minimum pressure in them to give the tire clearance needed, and adjust if track conditions require (usually too sticky). Hope that helps!
I used to pull the front left wheel quite high off the ground but not the right one...I was told that the H&R bar would help cure this a lot, making the car leave more straight, but I'll see shortly when I go to the track...
