The Genuine Porsche Rack and Pinion Assembly (911) is a high-quality replacement part for the 99134700558 model. It is designed to provide smooth and precise steering for your Porsche vehicle. This assembly includes the rack, pinion, inner and outer tie rods, and steering gear. It is made from durable materials and is built to withstand the rigors of daily driving. This assembly is an essential component for maintaining the handling and performance of your Porsche 911.