KW V1, V2, V3: which one you actually need

All three lower the car. All three let you set the ride height on the threaded body. If that is all you want, the numbers stop being interesting very quickly and the cheapest one wins. The range exists because damping — not height — is what separates them.

What damping adjustment actually controls

A damper resists movement in two directions. Compression is the wheel moving up into the car, over a bump. Rebound is the wheel coming back down afterwards. They do different jobs and they feel different from the driver's seat.

Rebound is the one you notice. Too little and the car floats and keeps moving after the bump has passed; too much and it feels tied down and skittish over broken surfaces. Compression mostly changes how the initial hit arrives and how much the body dives under braking.

V1 — height only

Fixed damping, chosen by the manufacturer for road use, with the ride height in your hands. This covers the majority of road cars honestly and well.

Buy this if the goal is stance and a firmer, more controlled feel, and you have no intention of spending evenings turning knobs. There is no shame in it — a well-valved fixed damper set up at a sensible height is a better car than a badly adjusted three-way kit.

V2 — height plus rebound

You get one adjuster per damper, working on rebound. This is the step that gives the most real-world return, because rebound is the setting that changes how settled the car feels on the roads you actually drive.

It also lets you compensate for the car changing. Heavier wheels, a passenger load you carry often, a different tyre — all of these shift what the right setting is, and V2 lets you follow them.

V3 — height, rebound and compression

Both damper strokes adjustable separately. The reason to buy this is track use, or a car whose setup you intend to develop over time and measure the results of.

The honest warning: two independent adjusters mean you can make the car worse in more ways than you can make it better, and without a baseline you are guessing. If you buy a V3, write down your starting settings before you change anything, change one thing at a time, and drive the same road each time. Otherwise you have bought a V1 with extra knobs.

Choosing without overthinking it

• Daily car, want it lower and tighter. V1.
• Enthusiastic road driving, want to tune the feel. V2. This is the sweet spot for most people who ask us.
• Track days, or a project you develop. V3.
• You want firmness on demand and comfort the rest of the time. Look at the electronically adjustable options instead of climbing the mechanical ladder.

What none of them fix

A coilover does not repair worn bushings, tired top mounts or a bent subframe. If the car already has slop in it, the new damper will report that slop more clearly, not hide it. Replace the mounts and bushings while the suspension is apart — the labour is already paid for at that point.

And whichever you choose, budget the four-wheel alignment. Lowering changes camber and toe, and skipping the alignment is how a new set of tyres gets ruined before the coilovers are properly bedded in.

Paperwork

Approval requirements for suspension differ by country and by part, and the documentation supplied with a kit is what an inspector will want to see. Keep it. We cannot confirm what will be accepted where your car is registered — check that locally before you order.