2020-2024 BMW M8 Coilovers vs Lowering Springs Compared

The 2020-2024 BMW M8 (F91 convertible, F92 coupe, and F93 Gran Coupe) is one of the fastest cars BMW has ever built — a 4.4L S63 twin-turbo V8 making 600 hp in the base car and 617 hp with 553 lb-ft in Competition trim, launching to 60 mph in about 3.0 seconds. It also weighs roughly 4,295 lb and rides on a comfort-biased adaptive suspension tuned for grand touring. Upgrading the BMW M8 suspension is the single most transformative change you can make: a proper coilover or lowering kit sharpens turn-in, cuts body roll, and drops the center of gravity so the M8 finally corners like its power deserves. This comparison pits the KW Variant 4 coilover against the KW H.A.S. height-adjustable spring kit and H&R Sport Springs so you can match the right kit to your budget and goals.

Why the 2020-2024 BMW M8 Needs a Suspension Upgrade

The BMW M8 leaves the factory with adaptive M suspension (electronic damping control, or EDC) tuned to balance a 189-mph top-speed cruiser with track capability, which means a slightly tall stance and a soft comfort mode. At roughly 4,295 lb with a high beltline, the stock M8 carries visible fender gap and leans more than an M-badged super-coupe should when you push it. Lowering the car 0.5 to 1.2 inches lowers the center of gravity, reduces weight transfer, and tightens the response of the 275-section front and 285-section rear Michelin Pilot Sport 4S tires.

There are three ways to do it. A coilover replaces the strut and damper entirely, giving full control over ride height and damping. A height-adjustable spring (HAS) kit swaps in shorter, adjustable-perch springs while keeping the factory EDC dampers. And sport springs are a fixed-height progressive spring set that also retains the OE dampers. Each represents a different point on the price-versus-adjustability curve, and all three are in stock at NLP Performance in Tampa, FL.

KW V4 vs KW H.A.S. vs H&R Springs: BMW M8 Suspension Compared

Here is the fast answer: the KW V4 is the most capable and most expensive, the KW H.A.S. is the best all-around value because it keeps EDC, and the H&R Sport Springs are the budget entry point. The table below compares the three most decision-relevant attributes — suspension type, adjustable drop, and whether the kit keeps the factory adaptive dampers — with pricing from NLP Performance.

KW Coilover Kit V4: The No-Compromise BMW M8 Coilover

The KW Variant 4 is the flagship of KW's street-and-track coilover range, developed for supercars, sports cars, and performance-oriented sedans exactly like the M8. It is the only kit here that replaces the dampers, and it gives you the widest tuning window of any M8 suspension on the market.

What makes the V4 special is separate control of rebound and compression. The rebound circuit offers 16 precise clicks, low-speed compression offers 6 clicks across 7 characteristic curves, and high-speed compression offers 15 clicks across 16 curves. In plain terms: you can tune body control and grip for a track day, then soften low-speed compression for a comfortable commute — without ever pulling the car apart. The stainless-steel ("inox") damper bodies resist corrosion for the life of the car, ride height is adjustable 0.4 to 1.2 inches (10–30mm) front and rear, and the kit is TUV-approved. Because the V4 supplies its own high-performance dampers, it includes an EDC deactivation kit that disables the factory adaptive suspension.

KW H.A.S.: The Best-Value M8 Lowering Kit That Keeps EDC

The KW Height Adjustable Spring (H.A.S.) kit is the smart-money choice for M8 owners who love the factory adaptive dampers. It is a spring-only kit with threaded, adjustable perches — so unlike ordinary lowering springs, you can dial in the exact ride height and re-level the car after installation, then keep every EDC comfort and adaptive-suspension function fully operational.

The H.A.S. lowers the M8 a continuously adjustable 10–30mm (0.4–1.2 in) up front and 0–25mm (up to 1.0 in) at the rear, so you can set a subtle stance or a purposeful drop and fine-tune corner balance with the KW height adjuster. Because it retains the OE EDC dampers, every driver-assistance and adaptive-comfort feature keeps working exactly as BMW intended — there is no fault code, no ride-quality penalty in Comfort mode, and no loss of the M-specific damper mapping. For a daily-driven M8 that occasionally sees a canyon road, this is the sweet spot at roughly a fifth of the V4's price.

H&R Sport Springs: The Budget BMW M8 Drop

If you want a cleaner stance and tighter handling without a five-figure invoice, H&R Sport Springs are the entry point at $560.15. They are progressive-rate lowering springs engineered specifically for the M8's adaptive-damper chassis, and they retain the factory EDC struts — a genuine bolt-in for owners who want the look and a meaningful handling gain on a budget.

H&R publishes a drop of roughly 25mm (1.0 in) at the front axle and 15mm (0.6 in) at the rear for the M8, though exact figures vary slightly by body style. The progressive rate keeps the ride livable over broken pavement while firming up as the spring compresses in hard cornering, and the lower center of gravity noticeably reduces dive and squat. H&R offers dedicated part numbers for each M8 body style — 28686-3 for the F92 coupe, 28686-4 for the F93 Gran Coupe, and 28686-2 for the F91 convertible with adaptive suspension — so you get the correct spring rates for your car's weight distribution.

How to Choose: Coilover, Height-Adjustable Spring, or Sport Spring?

Match the kit to how you actually use the car. If your M8 sees track days, autocross, or you simply want the ultimate in adjustability and are willing to delete EDC, the KW V4 coilover is the answer — nothing else here lets you fine-tune rebound and compression separately. If your M8 is a fast street car and daily driver where you value the factory adaptive damping and comfort modes, the KW H.A.S. gives you an adjustable drop and keeps everything OEM for $1,704.00. And if you want the best-looking, best-handling M8 you can build for around $560, the H&R Sport Springs deliver a clean 1.0-inch front drop with zero electronics headaches.

One tip from our Tampa shop: because the M8 is all-wheel drive and heavy, we recommend a professional corner-balance and alignment after any of these kits, and an EDC-retaining option (H.A.S. or H&R) if you plan to keep the M8 mostly on the street. Our customers running the V4 on track report the biggest lap-time gains, while H.A.S. buyers consistently praise how the car keeps its factory ride comfort.

Complete the M8 Build: Cooling and Exhaust

Suspension is the foundation, but the S63 twin-turbo V8 rewards a few supporting upgrades. Because the M8 makes 617 hp under boost, heat management is the next priority — and a freer-flowing exhaust unlocks the sound this V8 deserves.

CSF Twin Charge-Air-Cooler Set

The CSF Twin Charge-Air-Cooler Set ($2,799.00, part csf8178) replaces the factory intercoolers on the F90 M5 and F9x M8 with a high-capacity core set that keeps intake temperatures down for consistent power on repeated pulls — essential for track use in Florida heat.

CSF High-Performance Engine Oil Cooler

The CSF Engine Oil Cooler ($719.00, part csf8317) adds oil-cooling capacity for the F9x M5/M8, protecting the S63 during sustained high-load driving where the factory system can heat-soak.

Borla ATAK Cat-Back Exhaust

For sound and a modest weight savings, the Borla ATAK Cat-Back Exhaust ($3,614.99, part bor140988CFBA) for the M8 Gran Coupe brings Borla's most aggressive valved sound profile with carbon-fiber tips, letting the twin-turbo V8 breathe and roar without droning on the highway.