Cutting springs a slight amount is the correct way to fine tune the ride height of even performance springs. Now it is obviously up to the technician doing the final install to determine if the final ride height will effect the performance of all the rest of the geometry in the suspension. I've owned 3 Mustangs in the past that all had 1 coil cold-cut off the front and 1 1/4 coils off the rear and one of those cars I had, had even gotten around 85,000 miles of my hard driving on it with them cut like that with absolutely NO problems ever. It dropped about 1 inch all the way around. And the car with that setup did ride just a tad stiffer, but that is because there is one less coil to absorb shock in the suspension as before. It worked good, because it stiffened the suspension a slight amount to really increase the handling of the car a lot. Now you don't want to lower your car too much or you gotta make other changes as well to compensate. Like after so low you need offset rack bushings to raise your rack & pinion unit up so your tie rods are level again (to elliminate bumpsteer) to name one thing. But the idea is not to take out so much spring that they fall out when you jack the car up and the suspension fully extends, no. It is just to lower the ride height by a slight amount to effectively lower your center of gravity a little bit and adding a slight amount of stiffness to help reduce sway. I'm going to cut a slight bit off my Contour's front springs pretty quick so I can just bring the level even with the rear (to counteract the weight of my speaker box in the rear). And I know I will have no adverse reactions from this since I will only be going about 1 inch down and then I will do an alignment again to make sure that the lowering didn't throw off the caster/camber/toe to unacceptable levels. 1 inch is not enough to cause havoc in the geometry. The key is not to go too far with cutting. Or any method of lowering for that matter. Lowering springs can ALSO throw your suspension way off correct geometry, making it necessary to do many other mods to bring everthing back into safe tolerances again. Technician must be educated enough to know of any adverse reactions that may result from any mods he makes to the suspension. I have my ASE certification in suspension and with all my knowledge, I have no problem with cutting springs as long as you know what your doing and how far you are going.
