XYZ Racing Top Sport Coilovers — BMW 4 SERIES F83 M4 (Modified Rear Integrated) 2014-2020

The F83 M4’s drop-top body carries extra mass over the S55’s twin-turbo shove, and that weight sits high enough to load the rear axle differently under trail-braking than it does in the coupe. XYZ Racing’s Top Sport coilover kit for the BMW 4 Series F83 M4 (2014-2020) uses a modified rear-integrated mounting arrangement, so it locates correctly against the car’s factory multi-link geometry instead of fighting it.

Top Sport sits in the range for owners who use the car on track a handful of times a season but still commute in it the rest of the week. It raises spring rate and damping meaningfully over the factory setup without pushing the ride into daily-driving misery – the brief for this specific chassis is keeping the rear axle composed when the S55 unloads it, without turning the cabin into a shaker on the school run.

What this coilover does for your 2014-2020 BMW 4 Series F83 M4

Fitted to a 2014-2020 F83 M4, this kit raises damping by roughly 30-50% and spring rate by around 2kg/mm over the standard street setting. That is enough to control the extra unsprung mass the convertible carries without the harshness that comes from simply bolting in a stiffer spring on its own. On the road you will feel less of the vertical head-toss the factory M Sport suspension allows over broken B-roads, because the extra damping force absorbs the jolt from potholes and expansion joints before it reaches the shock body. Under load – heavy braking into a hairpin, or hard acceleration out the other side – the rear axle stays planted for longer, which translates directly into more usable tyre traction from the factory-width rear rubber. The net effect is a car that turns in with less roll and puts the S55’s torque down more consistently through a full track session, while still riding acceptably enough for the drive home.

About the Top Sport coilover

Top Sport is XYZ Racing’s step up in damping and spring rate from a full-street setup, aimed at cars that see a track day or two a year alongside regular road use. The kit increases damping force by roughly 30 to 50% and spring rate by around 2kg/mm compared with the street specification, which changes how the shock body reacts to sharp inputs: instead of transmitting the full force of a compression event straight into the chassis, the added damping suppresses that motion at the shock itself. That keeps the tyre in contact with the road for longer, which is where the stability gain actually comes from rather than just a firmer seat-of-the-pants feel. The valving and spring rates in this kit come out of XYZ Racing’s own Top Sport testing programme, set up for aggressive road driving and repeated track sessions rather than a single flat-out sprint.

Fitment for the BMW 4 Series F83 M4 (2014-2020)

This kit is built for the BMW 4 Series F83 M4 across the 2014-2020 production run, using a modified rear-integrated mounting configuration to match the car’s factory rear multi-link setup. Check your build year falls within this range before ordering, as BMW revised subframe and mounting points across the F8x generation’s production life.

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Spec your height, damping and spring rate to match how you actually use your F83 M4 – configure yours below.