still has to grow on me a bit more before I officially “like” it. The newest creation from Porsche tuner 9ff, the Panamera PT-55, is speeding up that “growing” process for me. If you view the videos below you will understand what I mean. The exhaust sound alone will make you forget about that ugly rear-end and help welcome this new beast into your heart. Not to mention this tuned 4-door Porsche is rated at 550hp!