AST BMW G42 M240I RWD Lowering Spring 30mm Front/25mm Rear - ASTLS-22-293

Lowering springs work with the stock shocks when the drop is mild, but a shorter spring makes the shock work harder, so many drivers pair them with shocks made for lowered cars. Shocks that are already worn should be replaced at the same time.

Yes. Lowering changes camber and toe, so align the car after the springs have settled.

The drop is set by the spring and is listed by the maker for each car; see the Part details above when it is stated. The car settles a little further over the first drives.

Lowering springs are firmer than stock but keep most of the comfort. How much firmer depends on the spring rate and the shocks they are paired with.

It needs a spring compressor and jack stands; without both, a shop can fit them. Torque the suspension bolts with the car sitting at ride height, not hanging in the air.

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