EXCEPT Vehicles with Porsche Sport Exhaust (PSE) (Borla(r) system does NOT contain active valves). This 2.25" diameter Borla(r) Cat-Back(tm) system is tailored to the 2.0L & 2.5L turbocharged engines available in the 718 Cayman/ 718 Cayman S and 718 Boxster/ 718 Boxster S, and is tuned with performance and sound in mind. Our S-Type sound level will deliver the distinct Borla(r) Sound of Power, not to mention a more exciting driving experience. As expected, there is no compromise on comfort with our No-Drone guarantee. You can count on Borla(r) system to give your 718 Cayman or Boxster the sound you want. T-304 stainless steel construction provides additional durability over the stock exhaust. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. The system is finished of with single 4"round polished T-304 stainless steel tips on each tail pipe. Best of all, Borla(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.