Next Level Performance
July 29, 2026 • 11 min read
Upgrading to BMW M8 coilovers is the single biggest handling change you can make to an F91, F92, or F93 — and the KW V4 coilover kit ($8,774) is the flagship option for owners who want motorsport-grade damping control without sacrificing street civility. The M8 leaves BMW with a 600–617 hp twin-turbo V8 and an electronically controlled Adaptive M suspension tuned for comfort first, body control second. This guide covers exactly how our Tampa, FL shop installs KW V4 coilovers on the M8, why the electronic damper delete matters, how to set ride height and corner weights, and how the V4 stacks up against the KW H.A.S., H&R, and AST alternatives.
Our Verdict
The KW V4 coilover kit is the definitive suspension upgrade for the BMW M8 — a 3-way adjustable, TUV-approved coilover that deletes the factory electronic dampers and gives you separate low-speed and high-speed compression plus rebound control.
Budget 4–6 hours of professional install time, plan for a corner-balance and 4-wheel alignment afterward, and expect a transformed 4,150–4,500 lb super coupe that finally turns in like a lighter car. Want a bolt-on that keeps the OEM adaptive dampers instead? Step down to the KW H.A.S. height-adjustable spring.
Shop the KW V4 Kit →What Makes the BMW M8 (F91/F92/F93) Chassis Different?
The BMW M8 is a heavyweight grand tourer built on BMW’s CLAR (G-chassis) platform, and it shares its S63 4.4L twin-turbo V8 and ZF 8-speed automatic with the M5 (F90). Curb weight runs from just over 4,150 lb for the F92 Coupe to nearly 4,500 lb for the F93 Gran Coupe. In standard trim it makes 600 hp and 553 lb-ft; the M8 Competition bumps output to 617 hp while torque stays at 553 lb-ft. All-wheel-drive M xDrive launches to 60 mph in roughly 3.0 seconds (the Competition dips toward 2.5 seconds by BMW’s clock), with a 155 mph limiter that opens to 190 mph with the M Driver’s Package.
The three body styles matter for parts fitment: F91 is the Convertible, F92 is the Coupe, and F93 is the Gran Coupe (the four-door). All of them ride on Adaptive M suspension with electronically controlled dampers — the ECU adjusts each corner in milliseconds through Comfort, Sport, and Sport Plus. That is exactly why you cannot simply bolt on a passive coilover and walk away: pull the factory struts and the car will flag a suspension fault unless the electronic dampers are properly cancelled. Every serious M8 coilover kit has to solve that problem, and the KW V4 solves it in the box.
KW V4 stainless-steel strut assemblies replace the M8’s factory electronically controlled dampers.
Why the KW V4 Is the Flagship BMW M8 Coilover
The name is the first thing to clear up: V4 stands for “Variant 4,” not four-way adjustment. The KW V4 is a 3-way adjustable coilover — KW’s street-legal version of the Clubsport motorsport damper — giving you independent rebound (16 clicks) plus separately adjustable low-speed compression (6 clicks) and high-speed compression (15 clicks). That separation is the whole point: low-speed compression controls body roll, dive, and squat during driving inputs, while high-speed compression handles sharp impacts like expansion joints and curbs. You can firm up cornering support without turning every pothole into a hammer blow — impossible with a single-adjuster coilover.
KW builds the V4 with stainless-steel “inox-line” strut bodies that resist corrosion, a twin-tube damper design, and monoball top mounts for precise wheel location. Ride height is continuously adjustable roughly 15–35 mm (0.6–1.4 in) via the threaded strut body, so you can set an exact stance and dial in corner weights. Critically for the M8, the kit includes an electronic damping cancellation module: it plugs into the factory EDC harness so removing the OEM adaptive dampers throws no fault code and needs no dealer coding. The V4 is TUV-approved and carries a limited manufacturer warranty. At $8,774 it is a serious investment — but it is the same hardware philosophy KW puts under Nurburgring 24-hour race cars.
KW V4 — Key Specifications
The complete KW V4 kit for the M8 — struts, springs, adjusters, and the EDC cancellation module.
BMW M8 Coilover & Suspension Options Compared
Not every M8 owner needs a $8,774 3-way coilover. The right choice depends on whether you want full ride-height and damping control or a simpler lowering setup that keeps the factory adaptive dampers. Here is how the four suspension paths we stock for the M8 compare, from the flagship KW V4 down to a value lowering spring.
| Kit | Type | Adjustable | Keeps OEM Dampers | Price |
|---|---|---|---|---|
| KW V4 Coilover KitTop Pick | 3-way coilover | Height + rebound + hi/lo compression | No (EDC delete) | $8,774.00 |
| KW H.A.S. Height-Adjustable Spring | Adjustable spring | Ride height only | Yes | $1,704.00 |
| H&R Sport Springs (F92) | Lowering spring | Fixed drop | Yes | $560.15 |
| AST Lowering Springs (25/20mm) | Lowering spring | Fixed drop | Yes | $440.26 |
KW H.A.S. — Adjustable Height, Factory Ride
The KW H.A.S. (Height Adjustable Spring) is the smart middle ground at $1,704. Unlike a fixed lowering spring, it lets you dial in the exact drop with a threaded adjuster while retaining the M8’s electronic dampers — so Comfort mode still soaks up highway miles and you keep the OEM warning-free ride-quality logic. If you want a more aggressive stance and sharper turn-in but do not track the car, this is the bolt-on we recommend.
H&R and AST Sport Springs — Value Lowering
For owners who just want to close the fender gap on a budget, H&R Sport Springs ($560.15) and AST Lowering Springs ($432.92, a 25mm front / 20mm rear drop) are progressive-rate springs that reuse the factory dampers and hardware. They deliver a cleaner stance and a modest handling bump, but they cannot be adjusted after install and they do not add damping control. Pair them with an alignment and you have the cheapest meaningful M8 suspension upgrade.
AST progressive-rate springs deliver a fixed 25 mm front / 20 mm rear drop on the OEM dampers.
How to Install KW V4 Coilovers on the BMW M8: Step by Step
Installing KW V4 coilovers on the M8 takes an experienced technician roughly 4–6 hours of labor, plus alignment and corner-balancing time. This is not a driveway install: the M8 uses electronic dampers, heavy AWD components, and precise BMW torque specs, and a mistake on a 4,150–4,500 lb, 617 hp car is expensive. Here is the exact sequence we follow in our Tampa shop.
Step 1: Prep, Lift, and Document Ride Height
Put the M8 on a lift, measure and record the factory fender-to-hub height at all four corners, then remove all four wheels. Documenting the stock height gives you a baseline so you can set a known, even drop later. Loosen the top strut nuts before the suspension is unloaded.
Step 2: Remove the Factory Electronic Struts and Shocks
Disconnect the electronic damper connectors, sway-bar end links, brake-line and ABS brackets, and the lower control-arm bolts, then extract the OEM strut and shock assemblies. Support the hub carriers — the M8’s AWD front uprights are heavy. Keep the OEM top mounts organized; the KW V4 reuses select factory hardware per the instructions.
The KW V4 front assembly torqued into the M8’s front upright before ride-height setting.
Step 3: Install the Electronic Damping Cancellation Module
This is the step that separates the M8 from an ordinary coilover swap. The KW V4 kit ships with an electronic damping cancellation module that plugs into the factory EDC damper connectors and simulates the OEM damper resistance, so the control unit sees a valid circuit. Without it, the dash lights up with a chassis-stabilization / suspension fault every drive. The module is plug-and-play and needs no dealer coding — route and secure it exactly as KW specifies before buttoning up each corner.
Step 4: Pre-Set Coilover Height and Bolt In
Assemble each KW V4 strut, pre-set the spring perch to your target ride height using KW’s reference measurements, and torque everything to BMW spec. Reconnect the sway-bar links, brake and ABS brackets, and control-arm bolts. Set the low- and high-speed compression and rebound adjusters to KW’s recommended street baseline before the car comes off the lift.
The V4’s separate compression and rebound adjusters let you tune the M8 for street or track.
Step 5: Corner-Balance and Align
Roll the car onto scales, set final ride height, and corner-balance to even out cross weights — essential on an AWD car this heavy for predictable handling. Finish with a full 4-wheel alignment: the M8’s camber and toe change when you lower it, and skipping the alignment will chew through $500+ Michelin Pilot Sport tires in a few thousand miles.
Dialing In Ride Height, Damping, and Corner Balance
A KW V4 is only as good as its setup. The kit adjusts continuously over roughly 15–35 mm, but start conservative: a street drop of about 0.6–1.0 inch (15–25 mm) from stock keeps suspension geometry, half-shaft angles, and bump-stop clearance sane on the M8 while still tightening the look and lowering the center of gravity. Going toward the bottom of the range on a street car invites excess negative camber, bump-steer, and reduced travel.
For damping, treat the three adjusters independently and start from KW’s supplied baseline. Set rebound (16 clicks) first for body control after bumps, use low-speed compression (6 clicks) to tune roll and brake dive, and back off high-speed compression (15 clicks) if sharp expansion joints feel harsh. Because the M8 weighs 4,150–4,500 lb, most street owners land softer than they expect. Re-torque the hardware and re-check ride height after the first 300–600 miles of settling, then re-align once the springs have fully seated.
KW’s threaded height adjusters make precise, repeatable M8 ride-height changes possible.
What We Like
- + 3-way damping with separate low- and high-speed compression — true street/track versatility
- + Included electronic damping cancellation means no dash faults on the M8
- + Continuously height-adjustable stainless bodies and TUV load testing
Things to Consider
- – $8,774 plus install, corner-balance, and alignment — a big investment
- – Deletes the OEM adaptive dampers; Comfort-mode softness becomes manual tuning
The KW V4 completely changed how my M8 Competition drives. Flat in the corners, no more float over crests, and once we corner-balanced it the car finally feels planted. NLP got the setup dialed for the street.
— Verified NLP Performance Customer | M8 Competition Owner | ★★★★★
Frequently Asked Questions
Do KW V4 coilovers fit the BMW M8 Competition?
Yes. The KW V4 kit for the M8 (part kws3A7200DZ) is engineered for the 2020–2024 M8 Gran Coupe (F93) including the M8 Competition, which shares the same chassis and 617 hp S63 drivetrain as the base 600 hp M8. KW also offers matching V4 applications for the F91 Convertible and F92 Coupe — confirm your exact body style and year before ordering.
Will coilovers trigger a suspension warning on the BMW M8?
Not if the electronic dampers are cancelled correctly. The M8 uses Adaptive M electronically controlled dampers, so removing them normally sets a chassis-stabilization fault. The KW V4 kit includes an electronic damping cancellation module that plugs into the factory connectors, so a proper install throws no dash warning.
How much can you lower a BMW M8 with KW V4 coilovers?
The KW V4 is continuously height-adjustable across roughly 15–35 mm (about 0.6–1.4 inches) front and rear, but we recommend a street drop of about 0.6–1.0 inch (15–25 mm). That keeps the M8’s suspension geometry, half-shaft angles, and bump-stop clearance in a safe range while still lowering the center of gravity and tightening the stance.
Are KW V4 coilovers streetable on a daily-driven M8?
Yes. The V4 is KW’s street-legal, TUV-approved version of its race damper, and its separate low-speed and high-speed compression adjusters let you soften impact harshness over rough roads while keeping firm body control. A properly tuned M8 rides better than most single-adjustment coilovers, and most owners run softer settings than they expect on a 4,150+ lb car.
Do I need an alignment after installing M8 coilovers?
Absolutely. Lowering the M8 changes camber and toe at all four corners. A full 4-wheel alignment (and ideally a corner-balance) after install is required to prevent uneven, accelerated tire wear on the car’s expensive staggered Michelin Pilot Sport tires and to keep the handling predictable.
KW V4 vs KW H.A.S. for the BMW M8 — which should I choose?
Choose the KW V4 ($8,774) if you want full height and 3-way damping control and are willing to delete the OEM dampers, especially for track use. Choose the KW H.A.S. ($1,704) if you want adjustable ride height but prefer to keep the factory electronic adaptive dampers and Comfort mode for daily driving.
How long does it take to install KW V4 coilovers on an M8?
Budget roughly 4–6 hours of professional labor for the four-corner swap on the M8, plus additional time for corner-balancing and a 4-wheel alignment. The electronic damper delete, heavy AWD components, and precise BMW torque specs make this a shop job, not a driveway install.
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