XYZ Racing Tarmac Rally Coilovers — Mercedes-Benz AMG GTR (Cancellation Kit for Electronic Damping) 2017-2023

The AMG GT R’s factory adaptive damping is tuned for the road-legal end of a car that already laps the Nordschleife in anger, which is exactly the compromise a sealed-stage tarmac rally build has no use for. The Tarmac Rally coilover strips that electronic layer out via the cancellation kit and replaces it with a fixed mechanical damper tuned specifically for the repeated hard impacts of stage work – cattle grids, crowned tarmac, mid-corner compressions that a road-biased ECU-controlled strut was never asked to shrug off.

Where the standard AMG GT R chassis moves its weight aft under load and leans on rear-end traction to put down its output, this kit is built to keep that weight transfer controlled through the kind of consecutive, unforgiving hits a closed-road stage delivers rather than the occasional track kerb.

What this coilover does for your 2017-2023 Mercedes Benz AMG GTR

Fitted to a 2017-2023 AMG GTR (Cancellation Kit for Electronic Damping), the Tarmac Rally kit is set up to absorb the shock of broken and uneven surfaces without transmitting that impact straight into the chassis – the damper is built specifically to soak up big hits across rough pavement rather than just fast-road ripples. That matters on stage because a harsh secondary hit through a compression is what unsettles the rear axle and costs traction on corner exit. The suppression of shock-body movement under those impacts is what keeps the tyre loaded and in contact with the road, which is the entire game in a car putting big AMG V8 torque through the rear wheels on loose or damp tarmac. The result on the car is a platform that stays composed lap after stage, not just corner after corner, with the front end settling faster after a crest and the rear staying planted enough to get back on the throttle earlier.

About the Tarmac Rally coilover

The Tarmac Rally is XYZ Racing’s damper built specifically around sealed-stage tarmac rally use, where the road surface is broken, cambered and inconsistent in a way closed-circuit track surfaces rarely are. Rather than chasing the last few tenths on a smooth apex, the valving is calibrated to absorb large, sudden impacts – the kind delivered by a rally-specific bump or a badly repaired section of tarmac – and to suppress the resulting body shock before it unsettles the chassis. That control is what XYZ Racing describes as increasing tyre traction through the hit rather than losing it, and it is the direct output of damping settings developed from the brand’s own tarmac rally programme rather than a generic road-and-track compromise. Vehicle stability is the stated design goal, aimed at giving the driver predictable handling through the exact sequence of hits a stage throws at the car rather than a single smooth corner. On the AMG GT R this construction sits underneath a chassis that already carries serious power and weight rearward, so the damper’s job of controlling body movement through repeated impacts is doing real work every time the surface changes underfoot.

Fitment for the Mercedes Benz AMG GTR (2017-2023)

This kit is built for the Mercedes Benz AMG GTR, chassis code ME39-C, across the 2017-2023 model years, and is specifically the cancellation-kit variant that removes the factory electronic damping control in favour of the Tarmac Rally’s fixed mechanical valving. Confirm your car carries the cancellation-kit-compatible electronic damping setup before ordering, since this SKU is matched to that configuration rather than the standard adaptive-damper GT R.

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This is a fixed-damping, stage-specific setup for a car that left the factory with electronics doing the job instead – configure yours below to match your ME39-C.