Coilovers for your car. Start with the right fit.

What are coilovers?

A coilover combines a coil spring and a shock absorber, or damper, in one assembly. The spring carries the vehicle's load and compresses as the wheel moves. The damper controls how quickly that movement happens, helping the suspension settle after a bump instead of continuing to bounce. In an adjustable aftermarket system, threaded hardware lets you set ride height, while an adjustable damper lets you tune its response.

The term describes a layout, not one fixed level of performance. A street kit and a competition kit can both be coilovers while using different springs, mounts and damping. Some vehicles also retain a separate spring and damper at one axle. Start with the system designed for your chassis rather than expecting every corner to look identical.

Coilovers, lowering springs or stock suspension?

Keep stock-style springs and shocks or struts when the priority is restoring the original ride and replacing worn parts. Lowering springs make sense for a defined drop with fewer adjustment choices, provided the dampers are compatible with the shorter springs. They do not repair a worn shock, and not every factory damper is suited to a lowered ride height.

Choose coilovers when you want a matched spring-and-damper package and the ability to set the car's height. Adjustable damping adds another way to tune the response. That flexibility also makes installation and setup part of the purchase. Read lowering springs vs. coilovers and coilovers vs. shocks vs. struts for the full comparisons.

Adjustable coilovers: ride height and spring preload are different settings

Ride height is where the car sits on its suspension. Preload is the spring's initial compression in the assembled unit before vehicle load is applied. Preload does not change the rate of a linear spring, and it is not a substitute for choosing an appropriate spring.

On a design with an adjustable lower mount, ride height can be changed separately from the spring's preload setting. Other layouts use a spring perch or a separate rear spring adjuster, so the correct method depends on the hardware. Follow the application instructions rather than turning whichever collar is easiest to reach. Leave factory preload alone unless those instructions call for a change. Use the KSport lowering-range guide to find the information for your kit; a maximum drop is not automatically a useful driving height.

What does damping adjustment do?

Compression damping controls the damper as the suspension compresses; rebound damping controls its return. Moving an adjuster changes damping force, not the spring rate. More damping is not automatically more grip or more comfort: excessive damping can make the car feel harsh, while too little can leave it poorly controlled.

A single-adjustable damper has one user control, which may change rebound alone or compression and rebound together depending on the design. Kontrol Pro and Kontrol Sport have 36 levels of damping adjustment. A two-way system commonly separates compression and rebound. A three-way system commonly adds separate low- and high-speed compression controls alongside rebound. Here, speed means damper-shaft movement, not road speed. Extra controls are useful when you can test and record their effects; the adjustment count alone does not select the right kit.

Camber plates, pillowball mounts and rubber mounts

Camber is the wheel's inward or outward tilt when viewed from the front. A camber plate provides adjustment at a compatible strut top mount. A pillowball is a spherical bearing that allows articulation; it is not, by itself, proof that the mount has camber adjustment. Suspension layout determines where alignment can be adjusted.

Rubber mounts isolate vibration and road noise. A rigid bearing mount can give a more direct connection but transmit more noise and vibration into the cabin. That is a useful trade-off to consider on a commuter, not a reason to assume every unfamiliar clunk is normal. Check the exact mount supplied for your application and have new or persistent noises investigated.

Monotube vs. twin-tube

A monotube damper uses one main working cylinder, commonly separating pressurized gas from oil with a floating piston. A twin-tube design uses an inner working tube and an outer oil reservoir. Both control motion by metering oil through valves. KSport's cataloged coilover design uses monotube dampers and 6061-T6 billet aluminum hardware. Construction matters, but the name of the damper layout alone does not tell you how a car will ride. Spring choice, valving and the complete installation matter too.

Setting up a daily driver

For street use, choose springs and mounts around the roads you actually drive. Keep a practical ride height with room for suspension travel, steering and tire clearance. Begin at the kit's specified damping baseline, then make small, recorded changes toward a softer or firmer response within the permitted range. Full soft is not a universal starting setting.

A hard spring, firm damping and rigid mounts can all increase the inputs you feel. Lowering excessively can add clearance problems and reduce usable travel on some designs. Decide which compromises you want before choosing a competition-focused system for a commuting car. The most expensive series is not automatically the most comfortable one.

Choosing a KSport series

KSport offers about ten coilover lines for different uses. For a street-focused build, start with Kontrol Pro and Kontrol Sport; Kontrol Sport is valved about 30% stiffer than Kontrol Pro. For street/track priorities, compare those with GT Pro and Kontrol Plus 2-Way. For a dedicated track build, include Circuit Pro 3-Way and Version RR.

Specialist disciplines deserve their own comparison: Slide Kontrol for drift, Asphalt AR and Gravel GR for rally, and Version DR for drag. Use these pages to compare the intended setup, then choose the exact vehicle application. A discipline label does not make different kits interchangeable.

Compare manufacturer-published features: K Sport vs BC Racing and K Sport vs TEIN. Verify the exact series and vehicle application.

Budget, installation and the first setup

Coilover cost changes with the application, damper design, adjustment functions, mounts and selected options. Use the live product listing for the current KSport price. Budget for professional installation and an alignment as well as any application-specific supporting parts.

Installation includes checking clearances, securing the hardware and setting ride height before alignment. Keep a record of the starting height and damping settings so changes are repeatable. Recheck the installation as directed by the kit instructions, and keep adjustment threads clean. The coilover support guide covers setup and care; have your installer work from the instructions for the exact kit.