Enhance the stance, handling, and suspension performance of your Porsche 991.2 Carrera with the KW Height Adjustable Spring Kit. Designed for Porsche 911 models equipped with the factory front-axle lift system, this premium suspension upgrade combines the adjustability of a coilover system with the convenience of retaining the original Porsche shock absorbers and electronic suspension functionality.
Unlike conventional lowering springs that provide a predetermined ride-height reduction, the KW H.A.S. (Height Adjustable Spring) system incorporates threaded spring perches that allow the vehicle's ride height to be adjusted within a manufacturer-tested range. This gives owners the flexibility to achieve their preferred stance while accommodating different wheel and tire configurations.
For compatible Porsche 991.2 Carrera applications, the system provides approximately 0.4–1.0 inches of front lowering and 0.1–1.2 inches of rear lowering, depending on the vehicle's original suspension configuration. Both the front and rear spring assemblies feature adjustable ride-height mechanisms for precise suspension setup.
One of the most significant advantages of the KW H.A.S. system is its ability to retain the factory Porsche shock absorbers. Rather than replacing the original dampers with aftermarket coilovers, the kit uses vehicle-specific springs engineered to work with the characteristics of Porsche's original suspension.
This design preserves the functionality of compatible factory electronic damping systems, including Porsche Active Suspension Management (PASM). Vehicles equipped with Porsche Dynamic Chassis Control (PDCC) can also retain the operation of that system when the correct application-specific kit is installed.
Importantly, KW part number 25371063 is designed for vehicles equipped with the original Porsche front-axle lift system. The suspension upgrade maintains compatibility with this factory feature, allowing owners to retain the ability to raise the front of the vehicle when approaching steep driveways, ramps, and other obstacles.
KW engineers develop application-specific spring rates to improve steering response and handling while maintaining the refined driving characteristics expected from a Porsche 911. The lower center of gravity can help reduce body roll and improve chassis stability during spirited driving.
The springs are manufactured from high-strength chrome-silicon steel and feature protective multi-layer coatings for long-term durability. KW also incorporates application-specific elastomer bump stops and dust protection components to help protect the factory suspension throughout its operating range.
Development and validation take place using KW's extensive suspension testing facilities, including its seven-post driving dynamics test center and Nürburgring Nordschleife testing program. This engineering approach helps ensure that the spring rates, ride-height range, and suspension travel are appropriately matched to the vehicle.
The KW Height Adjustable Spring Kit is an excellent option for Porsche 991.2 Carrera owners seeking a lower, more aggressive stance and improved handling without sacrificing their factory adaptive dampers or front-axle lift functionality.
Fits compatible 2017–2019 Porsche 911 Carrera (991.2) models
Fits compatible 2017–2019 Porsche 911 Carrera S (991.2) models
Fits compatible 2017–2019 Porsche 911 Carrera 4 (991.2) models
Fits compatible 2017–2019 Porsche 911 Carrera 4S (991.2) models
Fits compatible 2017–2019 Porsche 911 Carrera T (991.2) models
Fits compatible 2017–2019 Porsche 911 Carrera GTS / Carrera 4 GTS (991.2) models
Applicable to compatible Coupe, Cabriolet, and Targa configurations
Designed for the 3.0L twin-turbocharged Carrera platform
Factory front-axle lift system required
Compatible with vehicles equipped with or without Porsche Dynamic Chassis Control (PDCC), subject to application verification
Designed to retain compatible factory Porsche Active Suspension Management (PASM) functionality
Uses the original factory shock absorbers
Front lowering range: Approximately 0.4–1.0 inches
Rear lowering range: Approximately 0.1–1.2 inches
Front and rear ride heights are adjustable using threaded spring perches
Not intended for vehicles equipped with Porsche centerlock wheels
Not intended for Porsche 991 GT3 / GT3 RS
Not intended for Porsche 991 Turbo / Turbo S without separate application verification
Not intended for Porsche 992-generation vehicles
Not a complete coilover suspension system
Factory dampers must be in good operating condition
Actual lowering depends on original suspension specification, vehicle equipment, and axle loads
Professional installation required
Four-wheel alignment required after installation
Verify wheel, tire, fender, and suspension clearance throughout the adjustment range
Two (2) KW front suspension springs
Two (2) KW rear suspension springs
Front threaded ride-height adjustment components
Rear threaded ride-height adjustment components
Application-specific elastomer bump stops
Dust protection components
Installation hardware and adjustment components supplied by KW
Sold Separately:
Factory replacement shock absorbers, if required
Replacement suspension mounts or service hardware
Performance wheels and tires
Wheel spacers
Professional installation labor
Four-wheel alignment
Manufacturer: KW Suspensions
Product Line: KW H.A.S.
Manufacturer Part Number: 25371063
UPC: 847691077603
Product Type: Height Adjustable Lowering Spring Kit
Vehicle Application: Porsche 911 Carrera (991.2)
Model Years: 2017–2019
Engine Application: 3.0L Twin-Turbocharged Flat-Six
Factory Front-Axle Lift Compatibility: Yes
Factory Front-Axle Lift Required: Yes
PDCC Compatibility: With or Without PDCC, Subject to Fitment
Factory PASM Compatibility: Yes, for Approved Applications
Original Factory Dampers Retained: Yes
Spring Quantity: 4
Front Ride-Height Adjustment: Threaded
Rear Ride-Height Adjustment: Threaded
Front Lowering Range: Approximately 0.4–1.0 Inches
Rear Lowering Range: Approximately 0.1–1.2 Inches
Spring Material: High-Strength Chrome-Silicon Steel
Spring Finish: Multi-Layer Protective Coating
Spring Rates: Vehicle-Specific
Bump Stops: Application-Specific Elastomer
Dust Protection: Included
Damper Adjustment: Retained Factory Functionality
Centerlock Wheel Compatibility: No
Installation: Factory Spring Replacement With Adjustable Perches
Alignment Required: Yes
Manufacturer Warranty: KW Limited Lifetime Warranty, Unlimited Mileage
Sold As: Complete Vehicle Spring Kit
Continuously adjustable front and rear ride height allows owners to fine-tune the vehicle's stance using threaded spring perches instead of accepting the fixed drop of conventional lowering springs.
Factory front-axle lift compatibility preserves the operation of Porsche's original nose-lift system for added clearance when approaching driveways, ramps, and uneven surfaces.
Retention of factory PASM and electronic suspension functionality allows compatible vehicles to maintain their original adaptive damping features without converting to aftermarket shock absorbers.
Vehicle-specific spring rates are engineered to work with the original Porsche dampers, providing improved steering response and handling while maintaining balanced ride characteristics.
Premium chrome-silicon steel construction features multi-layer protective coatings and application-specific bump stops for durability and consistent suspension performance.
KW suspension engineering and testing combines vehicle-specific development with extensive evaluation at KW's seven-post test center and Nürburgring Nordschleife.
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