Porsche has unveiled a brand new, in-house developed twin-branch exhaust system for the Cayenne GTS Coupé, featuring two centrally located oval exits that offer a more sonorous sound signature.
This new exhaust system is the brainchild of Jörg Winkel (Porsche’s former head of acoustics who is now retired) who started developing it four years ago, but getting it done wasn’t without its challenges.
Development was tricky, because Porsche wanted the exhaust note to be unapologetically heard upon starting up, under heavy load and at higher engine speeds. But it also must be audibly experienced at low engine speeds, all while meeting country-specific requirements on noise emissions.
According to Porsche’s acoustics division, the new exhaust system produces a throatier sound, thanks to the special internal structure of the silencer. Its exhaust tracts from the V8’s two cylinder banks are separated to remove unwanted damping, and it is routed over the centre silencer through to the rear silencer.
SUV-engines periphery team lead Markus Sitzler said: “When the exhaust flap is closed, at low revs, the exhaust gas flow follows the bypass. In essence, it travels along an additional loop through a chamber of the main silencer with a perforated inner bottom before it returns to the main tract and is then discharged to the outside.”
This means the new GTS soundtrack is quieter under full load, but the bassy tones remain rich. To maximise the experience, engineers deliberately reduced the amount of insulation in the rear passenger compartment, which Porsche said “enhances” the entire sound experience with no compromise of comfort.
Sitzler said: “Like all exhaust systems from Porsche, the sound of the in-house development is 100% genuine – highly emotive with sonorous burbling on the overrun. The simplicity of the pipe layout as well as the material and weight saving – this is an approach we will definitely keep pursuing.”
Rico Löscher, Specialist for Complete Vehicle – Product Line SUV said the new exhaust system reminded him of racing cars. “The sound reminds me of high-revving naturally aspirated engines. It doesn’t sound like a muscle man, it sounds more like a fit athlete.”