XYZ Racing Top Sport Coilovers — Porsche 997 TURBO CARRERA-4 (Cancellation Kit for Electronic Damping) 2005-2011

Replacing the factory PASM dampers on a 997 is a decision that sits beyond the standard coilover swap. Porsche’s electronically controlled variable damping integrates directly with the PCM, and disconnecting those units without addressing the control circuit triggers persistent fault codes that have nothing to do with how the car actually handles. This XYZ Racing Top Sport kit includes the PASM cancellation harness that replaces the electronic damping management cleanly, so the conversion is complete from the moment the car leaves the ramp.

The Top Sport specification occupies the bracket between road comfort and full circuit commitment – 30-50 per cent more damping than standard street settings, paired with a 2 kg/mm spring rate increase over baseline. For a 997 Turbo Carrera-4, which carries the flat-six mass at the rear and distributes torque across all four corners under load, that uplift in body control translates directly into how confidently the car sets itself for corner entry and how cleanly it tracks through.

What this coilover does for your 2005-2011 Porsche 997 Turbo Carrera-4

The rear-engined AWD platform loads the rear suspension heavily under acceleration, and the 997 Turbo amplifies that with substantial torque across all four wheels. The 2 kg/mm spring rate increase above street specification reduces chassis pitch under those loads, sharpening throttle response off slow corners without generating the harshness that compromises a car used on public roads. Uprated damping at 30-50 per cent above street settings suppresses body movement over surface irregularities – the kind of mid-corner camber changes and expansion joints that unsettle the 997’s rear axle at speed. Tyre contact patch consistency improves as a result, which on an AWD platform matters most when the system is actively redistributing torque between axles. Height adjustability brings the centre of gravity lower across the usable range the Turbo’s arch clearance provides.

About the Top Sport coilover

The Top Sport series from XYZ Racing is calibrated from competition experience rather than a road-biased baseline with stiffer springs added as an afterthought. Damping runs 30-50 per cent beyond standard street values; spring rates step up by 2 kg/mm, a figure sized to handle the surface disruption of British circuit approaches without surrendering compliance on the road sections between them. The construction is designed to absorb jolts from large pavement breaks and uneven surfaces – specifically to suppress the body movement that reduces tyre traction on rear-loaded platforms – while delivering the handling consistency required for track day use and aggressive driving. For the 997 Turbo Carrera-4 application, the kit ships complete with the PASM cancellation hardware, replacing the variable electronic damping with a passive fixed-rate system that leaves the PCM fault-free throughout.

Fitment for the Porsche 997 Turbo Carrera-4 (2005-2011)

This kit covers the Porsche 997 Turbo Carrera-4 (chassis code PO04-2-C) across the full 2005-2011 production run. The PASM cancellation component is specific to cars fitted with Porsche’s factory electronic damping, which was standard equipment on Turbo variants across this generation. Confirm PASM fitment on your specific car before ordering; 997 models without the electronic damping system require a standard kit without the cancellation hardware.

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