The reason I run them is for street strip use, for the track I have the shocks with 5 psi & 1/2 round of preload on the Caltrac bars, then for street driving I bring the pressure up to 15 psi & it unloads the Caltracs for street use, I REALLY want some Double adjustable coil overs with a VERY soft spring to accomplish my set up, BUT $700.00 for shocks is not in the budget, the air shocks seem to work good though, we will see how good with the 4.1 gear next time out.