TUNED Porsche 993 GT2 EVO Twin Turbo – Accelerations, Sounds & Turbo Whistle! Acceleration & Sound by turboandstance - March 3, 2018March 3, 2018 Just listen to the amazing turbo whistle sound of this modified Porsche 993 Turbo being unleashed on an airstrip and up a hillclimb course. This particular 993 is fitted with a GT2 Evo body kit and the 3.6 liter twin turbo flat six engine has been tuned to 600hp. Leave a comment