Porsche Gas Pressure Spring - 911 09-12 997-512-551-91 91155931901 however there are threads on

however there are threads on the Rennlist Porsche forums that will be of assistance (see links below)

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Porsche Gas Pressure Spring - 911 09-12 997-512-551-91 91155931901 however there are threads onPorsche Gas Pressure Spring For Porsche 997 (2009 2012) Models. Maximize the performance of your car with Gas Pressure Spring 911 (09 12). This high quality spring provides maximum pressure for optimal engine performance, resulting in smoother acceleration and improved handling. Upgrade your car's performance with Gas Pressure Spring.