Bilstein B4 Shock Absorber FRONT. Porsche 997 C4 2005-08 22-147493 / 22-147509

They can actually represent a performance upgrade when replacing simple, non-gas-filled, oil-filled shock absorbers. They drastically reduce cavitation/oil foaming, thus ensuring more stable damping forces during "spirited" driving. Some surprising cars come with simple oil-filled shock absorbers. Manufacturer: Bilstein.

• Porsche 997 MK1 Carrera 4 3.6L (2005–2008)
• Porsche 997 MK1 Carrera 4S 3.8L (2005–2008)
• Porsche 997 MK1 TURBO (2007–2009)

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