Had my 2018 Porsche Cayman S in to have the Fabspeed Supercup turbo back exhaust installed, and the guys at GMW quoted me the lowest price in town, along with explaining that they have already installed this exact exhaust on a handful of new Cayman's/Boxster's alteady (all of the other shops quoted me twice as much AND admitted they had never installed this exhaust before). So, GMW's experience, professionalism, and great prices made this an easy choice! They did fantastic work and the car sounds great!