TEIN Flex Z Coilovers Suspension Kit for Ford Mustang S550 2015-2023 GT 5.0 & 2.3 EcoBoost | Height Adjustable 16-Way Twin-Tube Dampers | Lowering Kit UK Shocks & Springs | Track/Fast Road | Adjustable Struts

Transform your Mustang’s stance, grip and ride quality with TEIN’s height-adjustable suspension kit for the S550 platform. This premium Japanese-built damper and spring package gives you the look you want and the control you need on British roads, track days and fast road drives. Perfect for 2015 onwards models including GT 5.0 and 2.3 EcoBoost, fastback and convertible.

Engineered with a twin-tube design for real-world comfort, this coilover set delivers smooth stroke movement over rough, bumpy tarmac while tightening body control for confident cornering and braking. The 16-click damping adjusters make it easy to fine tune firmness for daily driving, spirited B-road blasts or circuit use. Dial it soft for commute comfort or firm it up for razor-sharp response. The full-length body construction allows ride height adjustment with minimal change to travel, so you can lower your Mustang without ruining compliance.

We’ve installed this kit on customer S550s at MJ Modifications and the feedback has been outstanding. Owners love the improved turn-in, reduced roll and planted feel, as well as the purposeful lowered look. It is a proper upgrade over OE shocks and springs and a smarter choice than basic lowering springs if you care about handling and tyre wear.

Why choose this adjustable suspension kit

• Ride height adjustment for the perfect stance and wheel fitment
• 16-stage damping control for easy street to track setup changes
• Twin-tube internals for supple low-speed ride and stability at speed
• Upper mounts included for straightforward, bolt-on installation
• High-rigidity brackets and durable shell case for long service life
• EDFC compatible for in-car damping adjustment upgrade
• Sag-resistant springs and high-spec damper oil for consistent performance

Fitment

For Ford Mustang S550 2015 onwards. Suitable for GT 5.0 and EcoBoost models. Ideal for daily driven cars, fast road builds and track day projects across the UK.

Key specs

Front spring rate: 7 kg/mm
Rear spring rate: 13 kg/mm
Approximate drop range: from -13 mm to -74 mm

Real-world benefits

• Sharpened steering response and mid-corner stability
• Reduced squat and dive for better traction and braking
• Even tyre contact for improved grip and wear
• Aggressive but usable ride height for road and show

Installation and support

Need fitting or a fast road or track day setup We can help. Book professional installation and alignment with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

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