Coilovers Vs. Lowering Springs
You want to lower your car. The question is whether you need coilovers, or whether lowering springs will do the job for a fraction of the cost. Coilovers cost more. Lowering springs are simpler. This guide to coilovers vs lowering springs shows what the extra money gets you.
How Coilovers Work
What Are Coilovers?
A coilover puts a coil spring and a damper together in one unit. It replaces your factory spring and shock or strut at each corner. Your control arms, knuckles and hubs stay. The threaded body lets you change ride height without swapping springs. The damper is valved to work with the spring it ships with.
How you set height depends on the kit. On a full-length kit, like BC Racing and Fortune Auto, the threaded lower mount sets ride height. The spring perch sets coilover preload on its own. On a sleeve-style kit, the perch sets height and preload together. Either way, a locking collar holds each setting in place.
That is the core mechanical difference. A lowering spring gives you one fixed ride height. A coilover lets you set your stance, corner balance the car and return to the same setting every time.
Benefits of Coilovers
Adjustable ride height. Spin the lower mount or the perch and the car moves with it. You are not stuck with whatever height a spring puts you at. Raise it for winter, drop it for a show, or find your daily height and leave it there.
Matched spring and damper. This is the part most buyers overlook. In a kit, the spring rate and the damper valving are chosen together. The damper is set up to control that spring. That pairing is what makes a good coilover feel controlled and predictable.
Adjustable damping. On adjustable kits, you can make the ride firmer or softer after installation. Soften it for rough roads. Firm it up for canyon runs or track days. Click ranges and click direction differ by brand, so start from the kit's manual setting.
Corner balancing. Each corner adjusts on its own. That makes corner balancing possible: a shop sets cross weight near 50% on the scales, so the car turns the same way left and right. Lowering springs cannot do this.
Room to grow. Goals change. Taller wheels, a different stance, a first track day. With a good kit, you adjust the setup or swap spring rates instead of starting over.
How Lowering Springs Work
What Are Lowering Springs?
Lowering springs replace your factory coil springs in the stock location. They are shorter than stock and usually stiffer. That drops the car by an amount set by the spring design. The drop is fixed. The spring sets the height and you live with it.
Your factory dampers stay in the car. That detail matters more than most people think.
Advantages of Lowering Springs
Lower cost. A quality set of lowering springs from Eibach or H&R costs a fraction of a full coilover kit. If cost is your main limit, that gap is real.
Simple parts swap. Old springs out, new springs in. They fit the stock seats and use your existing shocks and struts. On strut cars you still need a spring compressor, and that job deserves respect.
A step up from stock. A well-matched lowering spring on healthy dampers can sharpen a street car. You get a lower center of gravity, less body roll and a cleaner stance.
The Hidden Cost of Lowering Springs
Why Factory Dampers Struggle
Factory dampers are valved for the factory spring rate at the factory ride height. Lower the car on stiffer springs and those dampers work outside the range they were tuned for. You can get extra bounce, faster damper wear and handling that feels unsettled.
Here is why. A stiffer spring stores more energy in each bump. The factory damper was never valved to control that much spring. The drop also eats into bump travel, so the car may ride on its bump stops more often.
So do lowering springs ruin handling? How much this matters depends on the car. A modest drop on a newer car with fresh dampers is the forgiving case. A big drop, or a car with tired dampers, is where the mismatch shows up fast.
The common path goes like this. Lowering springs first. Then new dampers when the old ones wear early. Then coilovers anyway. Add it up and the step-by-step route often costs more than starting with a coilover kit.
Lowering Springs vs Coilovers: Performance Compared
Coilovers lead on adjustability and handling control. Lowering springs lead on upfront cost and simplicity. So what's better, coilovers or springs? Neither one is the answer for every car.
Why are coilovers better than springs for handling? The matched spring and damper is the big advantage. Add adjustable damping and corner balancing, and you get a car that is easier to sort. It responds more predictably. It can be tuned for different roads and different days.
One thing neither swap changes much is unsprung weight. That is the mass the springs do not carry: wheel, tire, hub, brakes, knuckle and part of the arms, damper and spring. A coilover does not automatically weigh less than the factory strut. If you want less unsprung weight, look at wheels, tires and brakes first.
Cost and Installation Considerations
Lowering Springs
The lowest entry cost of the three paths. Install is a spring swap in the stock seats. Pair them with dampers made for lowered cars. Bilstein B12 Pro-Kit packages Bilstein B8 dampers with Eibach Pro-Kit springs for this reason.
Value-Focused Coilovers
BC Racing gives you a full coilover kit at a value price. TEIN Street Basis Z gives you height adjustment with fixed damping. Install takes more time than springs, but it is a bolt-in job on most cars.
Adjustable and Hand-Built Coilovers
KW, Fortune Auto and Öhlins each build their kits their own way, at their own prices. Expect more damping adjustment, custom valving or racing-derived designs. Seals and oil are wear items on any damper, so plan for rebuilds over time.
A Note on Branded vs No-Name Coilovers
The choice is not always coilovers versus lowering springs. Sometimes it is a well-engineered kit versus a no-name one. An unknown low-cost kit can ride worse than a good set of lowering springs on fresh dampers. The engineering behind the kit matters more than the category.
BC Racing uses nitrogen-charged monotube dampers across its lineup. The BR Series is the volume kit, with 30-click simultaneous compression and rebound. Swift Springs SPEC-R springs are an upgrade option on most BC Racing fitments. That is a lot of adjustment for the money.
KW, a German brand, offers the KW V1, KW V2 and KW V3, all with height adjustment. Fortune Auto hand-builds its kits in Virginia, with custom valving for your application. Öhlins has decades of racing history and uses DFV valving on its Road & Track kits. We stock all of them in our coilover kits range, and we will tell you which one fits your car.
Which Option Is Right for You?
Choose Coilovers If
You want adjustable ride height, tunable damping, corner balancing and a matched spring and damper. If you track the car, like dialing in setups or want room to change your mind, a full kit is the right call.
Choose Lowering Springs If
Cost is the main limit, the car is a daily driver and you want one simple, fixed drop. Pair them with dampers made for a lowered car. Done that way, lowering springs are a legitimate choice.
Frequently Asked Questions
These are the questions we hear most from customers choosing between a coilover kit and lowering springs for their first suspension upgrade.
What is the difference between coilovers and lowering springs?
Coilovers replace your factory spring and damper with a matched unit at each corner. You get adjustable ride height and, on most kits, adjustable damping. Lowering springs replace only the springs. They drop the car by a fixed amount and keep your factory dampers.
Do coilovers handle more precisely than lowering springs?
For performance driving, usually yes. The matched spring and damper, adjustable damping and corner balancing give you more control. For a daily driver with a modest drop, good lowering springs on dampers made for lowered cars can work well at a lower cost.
What are the advantages of lowering springs?
Lower cost, a simple parts swap and a real step up from stock. On healthy dampers, they lower the center of gravity, cut body roll and clean up the stance. If you want one fixed drop and no adjusting, they make sense.
How do coilovers improve car handling?
The damper is valved for the spring it runs with, so body motion stays controlled. Adjustable damping lets you tune for the road. Corner balancing evens out cross weight. The car behaves predictably, without the mismatch of stiff springs on factory dampers.
Do coilovers reduce unsprung weight compared with lowering springs?
Not automatically. Unsprung weight is the mass the springs do not carry, like the wheel, tire, hub and brakes. A coilover can weigh about the same as the factory strut. Lighter wheels and brakes make the bigger difference there.
Can I install lowering springs myself?
Yes, with the right tools and care. You need a floor jack, stands, a spring compressor, sockets and a torque wrench. A compressed spring stores a lot of energy, so use a quality compressor. Get an alignment afterward, because any ride height change affects camber and toe. For a coilover kit, our guide on how to install coilovers covers each step.
Are TEIN High.Tech springs lowering springs?
Yes. Dealers list TEIN High.Tech as a lowering spring set. Like any lowering spring, it keeps your factory dampers and gives one fixed drop. If you want TEIN height adjustment, the TEIN Street Basis Z coilover kit pairs an adjustable body with fixed damping.
Can you buy coilover springs on their own?
Yes. A coilover spring sits on the kit's spring perch and is sized by length, inner diameter and spring rate. It is a different part from a lowering spring, which fits the factory spring seats. Swift Springs SPEC-R springs are an upgrade option on most BC Racing kits. Call us with your kit and we will match the size.
What should I consider when choosing between coilovers and lowering springs?
Your cost limit, how you use the car and whether you want to adjust it later. For a pure daily with a fixed drop, lowering springs on matched dampers do the job. If you want to adjust height, tune damping or track the car, start with a coilover kit.
How to Choose Between Coilovers and Lowering Springs
To settle coilovers vs lowering springs, ask yourself three questions. Do you want to adjust ride height more than once? Do you want to tune damping for different conditions? Do you plan to track the car or change your setup with the seasons?
If you answer yes to at least two, a coilover kit is the right choice. Lowering springs fit one clear case: a daily driver that needs a fixed, modest drop and no future changes. That case is narrower than most people expect.
A quality kit from BC Racing, KW or Fortune Auto gives you locking collar adjustment and a damper you can service. Seals and oil wear on any damper, and a rebuild brings them back. A lowering spring gives you neither. For a car you plan to keep and drive hard, the kit usually pays off over time.
Keep reading: Our guides to coilovers vs air suspension, stance and wheel fitment and lowering laws.
Not Sure Which Direction Is Right for Your Car?
Coilovers or lowering springs, the right answer depends on your car, your budget and how you use it. We know these cars, and we can tell you which option makes sense for yours.
We carry BC Racing, KW, Fortune Auto, Öhlins, Feal and TEIN. Call 1-800-460-9106 and tell us what you drive. If lowering springs are the right answer for you, we will tell you that too.
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