Kline Inconel Exhaust for 718 GT4, Spyder, GTS 4.0 for sale. I am the original owner. I purchased it for my, now sold, 718 Spyder. Increased power, 28lbs weight savings and exotic sound due to cross pipes. Currently sells for $8,966 and due to popularity has a 4-5 month waiting list. Feel free to reach out to me if you have any questions.