The Powerfull M178 Engine Mercedes produced for the 2015-17 AMG GTS is nothing short of a masterpiece, However these Engines come Severly De-Tuned form Merdedes Benz. Utilizing these 3” Stainless Steel Downpipes you will drastically reduce the ammount of back pressure generated from the turbos through the factory downpipes. Be prepaired to Free up Gobs of Horsepower and TQ!