Well, anything marked DeTomaso has to be correct, right? I have those same 18126A shocks that Byars and Wilkinson sell. Both of them state that they have not experienced any bad issues with those shocks. I admit, they are stiff, especially when warm after a drive warming up the engine bay. Byars indicated to me that these are good shocks because the pressure is very low on the shocks & decklid when it is closed, whereas other aftermarket do not have that feature. This is why I stuck with the DeTomaso 18126A instead of putting on my aftermarket ones that I bought. Now that you have the DeTomaso 18126A, is there anyway you could push them down on a scale to measure the pressure like I did with these others in my post below? I did some measurements with the pressure of my 4 post lift on top of the shock with a scale under it. You could probably do the same with a floor jack against something solid with the shock and scale between. Once and for all, lets find the pressure of these DeTomaso shocks.