KW HAS Adjustable Lowering Spring Kit for BMW 4 Series M4 (F83) Convertible/Cabrio 2014–2020 – Ride Height Drop & Stance Kit, EDC Adaptive Damping Compatible, Uses OEM Shocks – Coilover Alternative Suspension Upgrade

KW HAS Adjustable Spring Set for BMW M4 F83 Convertible 2014 to 2020

Give your BMW M4 F83 cabriolet the stance and handling it deserves with KW HAS adjustable springs. This ride height adjustable spring system lets you fine tune the drop while keeping your factory shock absorbers and adaptive damping fully operational. Expect a cleaner wheel arch gap, crisper turn in and a more controlled chassis without committing to a full coilover conversion.

At MJ Modifications we have installed multiple KW HAS kits on customer F83 cars and the feedback is consistently positive. Owners love the OEM like comfort on UK roads combined with a lower, more aggressive look and noticeably tighter body control. If you want a premium suspension drop with height adjustability that works seamlessly with the standard electronic damping, this is the go to choice.

What makes it a smart upgrade

• Ride height tuning using threaded KW spring perches front and rear for a precise drop to suit road, track or show.
• Keeps your factory adaptive suspension working as intended EDC remains fully functional.
• Uses original dampers for factory refinement with improved agility and reduced roll.
• Ideal for wheel and tyre changes when you want to dial in the perfect stance and even arch heights.
• Premium KW engineering and materials for long term reliability and consistent performance.

Key features

• Vehicle specific spring rates developed for the F83 platform for balanced road behaviour.
• High tensile spring steel for durability and stable performance over time.
• Included bump stops and dust protection sleeves where required for OE level integration.
• Sharper steering response, flatter cornering and improved traction while retaining day to day comfort.
• Clean, even lowering that enhances the M4 cabriolet’s appearance and road presence.

What is in the box

• Front and rear KW adjustable springs.
• Threaded adjuster sleeves and perches for height setting.
• Model specific bump stops and dust boots where applicable.
• All components designed to work with the standard suspension and electronics.

Compatibility

BMW M4 F83 Convertible 2014, 2015, 2016, 2017, 2018, 2019, 2020. Designed to be used with original BMW shock absorbers and integrates with factory adaptive damping and driver assistance systems. If you want us to confirm suitability for your exact build, get in touch and we will check fitment for you.

Installation

Professional fitting and a four wheel alignment are strongly recommended after installation. For expert installation, choose MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Why buyers choose this kit

Lower ride height without sacrificing comfort, adjustable perch springs for fine tuning, keeps adaptive shocks active, enhances cornering stability, delivers a premium look and feel. Proven on customer cars by MJ Modifications and a favourite for M4 owners who want the coilover look without changing dampers.

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