I know many who swap in Lowering springs (Pro/Corksport/Ebach/others) also pair them with non adjustable KONI or ST. Dropping coilovers too low...
But they all have their limitations. Sporty Daily drive, lowered look only, to light competition at autocross and occasional tracking.
(Here is the condensed version from a KONI factory expert)
Coilovers give users the option to improve and customize their car, but can also sour the handling if poorly adjusted. Often, after installing a set of coilovers,
the impressionable types will lower their car past the height for which the geometry is designed. A lowered center of gravity, are just two things a well-sorted
coilover provides. But it’s important to remember; it still needs to cushion the car over bumps and facilitate the right rate of weight transfer. Essentially, the
function of a shock is to improve the contact patch and control body movement. Both lowering and coilovers can do that....
First, you’ve got to ask: What’s the long-term plan with this car? Daily driver, weekend-only toy, dedicated track car, show car, or a mix?
Once you’ve considered how much you’re willing to compromise, you’ll have a better sense of what products are appropriate.
When you are only interested in a handful of track days in an otherwise daily driver, a set of replacement non-adjustable shocks is what you need.
They will work better than the OEM items; their damping is better-suited for performance driving. Plus, since car manufacturers are known to save
money on things that aren’t visible to the naked eye, it’s fair to assume that a modestly priced set of performance shocks will make a significant
difference — enough to introduce the avid amateur to a level of crispness they’re not familiar with seeing.
KONI says: For most beginners, they really just need to focus on ride height, which can be done with a simple strut and spring combination.
Their driving level isn’t high enough yet to appreciate and tune what the car’s doing, so a coilover would only confuse them,” he says.
These non-adjustable shocks quickly become limiting for the more experienced driver who is ready to refine the car’s handling and responses.
Unable to provide adequate chassis and suspension tuning, the non-adjustable shocks limit the more demanding drivers.
Now if you thinking of going to coilovers. “I’m a firm believer in strengthening the weakest link in the chain, so adding a set of $2,000 coilovers
isn’t smart if the rest of the car isn’t tight and up to the task.” Like adding tower brace, lower braces, other under carriage braces and stronger
stabilizer bars. Its doesnt mean that coilovers wont work without all that , just means it will works better with them.
There’s plenty of misinformation going around on the internet which suggests that someone can’t have fun with the car until there are go-fast parts on it.
To be honest, all you truly need are good shocks, good brakes, and good tires.
Hope that helps you with what to expect with lowered vs coilovers or just good shocks and how to get it from your car.