J_D said:
Because cutting the spring causes the car to bottom out all the time as the coils that have been removed are no longer holding the car up. Lowering springs are made out of stronger/thicker steel to stop this. Also a cut spring wont sit in the spring seats properly and can bounce out of the retaining seats while going over bumps.
this is true. coil springs are made to a certain rate and load capacity, what you are doing when you cut a spring is lessen it's load carrying capacity and alter its spring rate, what happens then is, the cut spring will lose its tension a lot quicker, because it is now working overtime to hold up a fat arsed commodore.......bottom line, it's illegal and very, very stupid.