XYZ Racing Tarmac Rally Coilovers — BMW 5 SERIES G31 (OE FOR REAR AIR STRUT) 2017-2026

The G31 Touring is an awkward starting point for a rally-spec damper. Its standard rear air strut was tuned for autobahn isolation, not for the repeated compression hits of a sealed-stage tarmac event, and once you start loading a 1.9-tonne estate into compressions and kerbs the OE air rear runs out of vertical travel long before the chassis runs out of grip. The XYZ Racing Tarmac Rally coilover replaces that air strut with a conventional spring-and-damper rear, which is the first thing any serious tarmac build for this chassis has to address.

Up front, the G31’s nose carries the weight of a long straight-six bay and the brake hardware that comes with stopping a five-metre executive estate. This kit gives the front axle a damper with the bump and rebound authority to keep the tyre on the road through a stage’s worst surface changes – the cambered crown of a closed B-road, expansion joints, broken edges – rather than skipping into understeer the moment the surface stops being German-smooth.

What this coilover does for your 2017-2026 Bmw 5 Series G31 (OE FOR REAR AIR Strut)

The first thing you feel is composure over impact. Tarmac Rally valving is built to take the jolt out of a big hit – a kerb strike, a mid-corner ridge, a compression at the bottom of a dip – and settle the body before the next input arrives, so the contact patch is loaded and predictable when you need to brake or turn. On a chassis as long and as heavy as the G31, that translates to a car that stops pogo-ing on its outside-front after a hard apex and lets you commit to the next braking zone instead of waiting for the chassis to catch up. The conversion away from the rear air strut also gives you a rear axle that behaves consistently from cold to hot, which the OE air system simply cannot promise once you start cycling it hard. Ride height and corner balance become things you set and trust, not things that drift over a stage.

About the Tarmac Rally coilover

The Tarmac Rally is XYZ Racing’s sealed-surface stage damper, valved specifically to absorb the impact of uneven pavement without unloading the tyre. The brief is to soak up big bumps, suppress body shock, and keep traction working through surface transitions – the failure mode this damper is built to prevent is the chassis skipping over a hit and arriving at the next corner unloaded. The settings carry across directly from XYZ’s own tarmac rally programme, so the bump and rebound curves are not a road-car kit with stiffer springs bolted in; they are a damper philosophy aimed at a specific kind of broken surface. For the G31 application that includes the rear conversion hardware required to delete the OE air strut and run a coilover in its place, which is the only way to get a usable rear axle on this chassis once the surface gets rough.

Fitment for the Bmw 5 Series G31 (OE FOR REAR AIR Strut) (2017-2026)

Specific to the G31 chassis (BM88) built between 2017 and 2026, in the variant that left the factory with rear air suspension. This is the OE-for-rear-air-strut version of the kit, which includes the rear hardware needed to delete the air strut and run a conventional coilover. Front-axle hardware is matched to the G31’s strut design over the same year span.

What buyers also search for

• Bmw 5 Series G31 rear air strut delete with coilover conversion for tarmac rally use
• G31 Touring coilover that survives kerb strikes and broken-surface stages
• BMW 5 Series 2017-2026 tarmac rally suspension for sealed special stages
• XYZ Racing Tarmac Rally damping for a heavy estate chassis on closed roads
• G31 BM88 coilover kit replacing factory air suspension at the rear

Pick your spring rates, ride height and rear conversion options below and build the spec that suits your stage programme.