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WM 461624 Installing Air Guide (Brake Air Ducts) For Rear Brake Discs (Gt3, Gt3 RS, Gt2 RS): Information: Notes

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To reduce the brake temperature on the rear axle, an additional brake-disc air guide is installed as standard (on vehicles with grey cast iron and PCCB brakes) from model year 2010 onwards.  This essentially means that a brake-disc air duct -1-  is secured to both the left and right wishbone.

To ensure effective delivery of cooling air, the brake-disc cover plates have appropriate cut-outs in this area.

To rule out the possibility of damage during transport, the additional brake-disc air guides must be installed before the vehicles are handed over to customers. The installation set is supplied with the vehicle.

The air guides can be retrofitted - and the brake-disc cover plates replaced - on 2007 and 2008 models. 

Fig 1: Identifying Air Guide (Brake-Disc Air Ducts)
G09826012Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Air guide (brake-disc air duct) at the left and right on the wishbone