Aston Martin Vantage KW H.A.S. Install Guide (2018-2025)

Installing the KW H.A.S. system on your 2018–2025 Aston Martin Vantage is the cleanest way to drop the ride height and dial in the stance without giving up the car’s factory adaptive dampers. The KW H.A.S. (Height Adjustable Spring) kit replaces the OE springs with threaded, chrome-silicon steel springs and adjustable perches, so you keep every Sport, Sport+, and Track damper mode while gaining continuous, coilover-style ride-height control. In our Tampa, FL shop we treat this as a precision spring swap plus an alignment — not a full strut rebuild — and this guide walks through the exact steps, torque points, fitment, and setup we use on the Type AM6 Vantage.

What Is the KW H.A.S. System?

The KW H.A.S. is a height-adjustable spring kit that lets you continuously lower the Aston Martin Vantage within a KW-tested range while reusing the factory adaptive dampers. Unlike conventional lowering springs, which are locked to a single fixed drop, the H.A.S. uses a threaded lower perch that you can rotate to raise or lower each corner even after the kit is bolted in. Think of it as coilover-style height control grafted onto your OE electronic struts.

KW builds the H.A.S. springs from high-quality chrome-silicon steel, with spring rates engineered for each specific OE damper and corner wheel load. That matching matters on the Vantage: the AM6 uses skyhook-style adaptive dampers with Sport, Sport+, and Track modes, and a mismatched aftermarket spring rate would confuse the valving. Because KW tunes the H.A.S. rate to the factory damper, all driver-assistance and comfort features stay operational — the adaptive modes keep working exactly as Aston intended. Across KW’s H.A.S. applications the adjustment window typically falls in the 5–35 mm range depending on the axle and car; the perch is threaded so you set the exact drop that clears your driveway and fills the arch.

Every H.A.S. kit ships with the vehicle-specific bump stops and a dust-protection system that shields the threaded perch and factory strut from road grime, so the adjuster keeps turning years down the road. In short: KW H.A.S. is a height-adjustable, OE-damper-compatible spring system designed for owners who want a lower, more planted Vantage without abandoning the factory adaptive suspension.

The H.A.S. grafts continuous ride-height control onto the Vantage’s factory adaptive struts.

KW Suspension

KW H.A.S. 2019+ Vantage Coupe (Type AM6) w/ Electronic Dampers

$1,864.00

🚚Free shipping

Part Number	kws25333003
Fitment	2018–2025 Aston Martin Vantage Coupe (electronic dampers)
Type	Height-adjustable spring, retains OE dampers

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Which Aston Martin Vantage Does the KW H.A.S. Fit?

The KW H.A.S. kit (PN kws25333003) fits every 2018–2025 Aston Martin Vantage Coupe (Type AM6) equipped with the factory electronic dampers. That covers the original 503-hp car and the 2024+ update. Both generations run the Mercedes-AMG-sourced M177 4.0-liter twin-turbo V8, so the front and rear wheel loads the H.A.S. is tuned around are consistent across the range.

Here is the fitment and platform context that matters before you order:

• 2018–2023 Vantage: AMG M177 4.0L twin-turbo V8, 503 hp (510 PS) and 505 lb-ft, roughly 3,726 lb curb weight, adaptive dampers with Sport / Sport+ / Track modes.
• 2024–2025 Vantage: reworked M177 making 656 hp and 590 lb-ft (800 Nm), 0–62 mph in 3.4 seconds and 202 mph — still on the AM6 platform with electronic dampers.
• Damper requirement: your car must have the electronic/adaptive damper suspension (standard on these cars) — the H.A.S. is engineered to keep that valving working.
• Shared engine platform: the same M177/M178 V8 lives in the Aston DB11/DB12/DBX and Mercedes-AMG GT, C63, E63 and GT 63, which is why KW offers the identical H.A.S. hardware across those chassis.

KW H.A.S. springs use chrome-silicon steel with rates matched to the Vantage’s OE adaptive dampers.

Tools, Parts, and Prep Before You Start

Before lifting the Vantage, stage every tool and torque spec so the spring swap goes in one clean session. The H.A.S. is a spring-and-perch job on the factory struts, so you do not need to fully disassemble the dampers, but you do need proper spring compressors rated for the load and a torque wrench for the strut and subframe fasteners.

What you need

• Two-post lift or four jack stands rated well above 1,000 lb per corner
• Heavy-duty coil spring compressors (internal or wall-mount clamp style)
• Metric socket and wrench set, plus Torx and hex bits for Aston chassis fasteners
• Calibrated torque wrench (10–150 Nm range)
• Ball-joint separator, penetrating oil, and a strut spreader if fitted
• Ride-height adjuster tool (included with the KW kit) and a tape measure
• Threadlocker and fresh factory fasteners where the manual calls for one-time-use bolts

Stage the KW springs, perches, and bump stops per corner before you lift the Vantage.

Plan on 3–5 hours of shop time for the spring swap and a follow-up wheel alignment. We always budget the alignment as a mandatory step, not an option: any change in ride height alters camber and toe on the Vantage’s double-wishbone front and multilink rear, and skipping it will chew the inside edges of a $1,500 set of tires. If you plan to push the engine further later, the same M177 platform accepts a forged bottom end — our CP forged piston set for the M177/M178 V8 is the common first step there — but that is a separate build from this suspension install.

How to Install the KW H.A.S. on Your Vantage: Step by Step

Installing the KW H.A.S. on the Aston Martin Vantage takes eight core steps: lift and secure the car, remove the wheels, unload and extract each strut, swap the springs onto KW’s threaded perches, reinstall, set a baseline ride height, torque everything, and align. Work one axle at a time so you always have a reference corner.

1. Lift and secure the Vantage. Raise the car on a lift or jack stands at the factory lift points, let the suspension hang, and remove all four wheels.
2. Disconnect what loads the strut. Unplug the adaptive damper connector, then release the sway-bar end link, brake line bracket, and any ride-height sensor arm so nothing is stressed as the strut drops.
3. Remove the strut assembly. Support the lower control arm, remove the top strut nuts and the lower mounting hardware, and lower the OE strut out of the car. Keep left and right separated.
4. Compress and separate the OE spring. Using proper spring compressors, safely relieve the factory spring tension, remove the top hat, and lift off the OE spring. Inspect the bump stop and top mount.
5. Fit the KW spring and threaded perch. Install KW’s vehicle-specific perch and bump stop, seat the chrome-silicon H.A.S. spring, and set the perch to KW’s recommended starting thread height. Reinstall the factory top hat and torque the strut rod nut to spec.
6. Reinstall the strut. Guide the assembly back in, start all fasteners by hand, then reconnect the sway-bar link, damper connector, brake bracket, and ride-height sensor.
7. Repeat on all four corners. Do the opposite side and the rear, keeping the perch thread heights matched side to side for an even stance.
8. Set the car down and check ride height. Lower the Vantage, roll it forward and back to settle the suspension, then measure fender-to-hub at each corner before final torque and alignment.

The threaded lower perch is what makes the drop continuously adjustable, unlike fixed lowering springs.

The H.A.S. spring seats on the OE strut, so the factory adaptive damper stays in the car.

Setting Ride Height and Alignment After Install

Set your final ride height first, then align the car — never the reverse. On the KW H.A.S. you rotate the threaded perch to raise or lower each corner, so the workflow is: pick a target fender height, adjust the perches evenly, settle the suspension, remeasure, and only then send it to the alignment rack. We recommend a modest 15–25 mm drop on a street Vantage to keep the factory geometry and adaptive damper travel happy while still tucking the wheel into the arch.

Ride-height and alignment tips

• Measure at the hub, not the tire. Use fender-lip-to-wheel-center so tire size does not skew your numbers.
• Roll and bounce before measuring. Push the car forward and back several feet after every adjustment so the springs seat.
• Corner-balance if you can. Even thread counts side to side get you close; a scale-based corner balance nails it.
• Alignment targets: reset front toe to zero or a hair of toe-out for turn-in, and pull rear camber back toward the factory window — lowering adds negative camber you may want to correct.
• Recheck torque after 100 miles. Confirm strut, perch lock, and subframe fasteners once the suspension has cycled.

A 15–25 mm drop tightens the Vantage stance while keeping adaptive damper travel intact.

KW H.A.S. Across the AMG V8 Platform: Vantage and Its Siblings

Because the Aston Martin Vantage shares the Mercedes-AMG M177 4.0-liter V8 and much of its electronic-damper hardware with the AMG GT family, KW offers the identical H.A.S. system across these cars at the same $1,864.00 price. If you cross-shop the platform, here is how the three most-searched H.A.S. applications line up. Every kit retains the factory adaptive dampers and delivers the same continuous, threaded height adjustment.

KW H.A.S. Pros and Cons for the Vantage

Each H.A.S. kit includes vehicle-specific bump stops and a dust-protection system for the adjuster.

KW rate-matches each H.A.S. spring to the Vantage’s OE damper valving and corner wheel load.