Looks like Cadillac is finally offering some powertrain improvements as official accessories. I don't know any details about the new exhaust besides what's posted but the descriptions states improved sound, less backpressure, and included retuning of the active noise cancellation system which is pretty nice. But the biggest surprise is that at the bottom of the description it makes a statement about a performance tune that increases power by 15 HP (so to about 300 for the 2.0).
"Give your vehicle even more attitude and sporting demeanor with the Performance Exhaust Upgrade System. This Catback system offers a more aggressive performance sound with great looks that will not void your factory warranty. It's made entirely from 304 stainless steel with 2 ½-inch pipes and 4-inch polished tips. This exhaust system also includes an active noise cancellation calibration that provides additional refinement and was developed specifically to enhance the unique sound character of this system. Back pressure is reduced by 36% compared to the stock exhaust, based on correlated flow testing. A performance engine calibration is also available separately that adds approximately 15 horsepower when combined with this exhaust system. Developed and backed by GM. this system is legal in all 50 states. (Available exclusively for 2.0L Turbo LTG engine.)"
"Give your vehicle even more attitude and sporting demeanor with the Performance Exhaust Upgrade System. This Catback system offers a more aggressive performance sound with great looks that will not void your factory warranty. It's made entirely from 304 stainless steel with 2 ½-inch pipes and 4-inch polished tips. This exhaust system also includes an active noise cancellation calibration that provides additional refinement and was developed specifically to enhance the unique sound character of this system. Back pressure is reduced by 36% compared to the stock exhaust, based on correlated flow testing. A performance engine calibration is also available separately that adds approximately 15 horsepower when combined with this exhaust system. Developed and backed by GM. this system is legal in all 50 states. (Available exclusively for 2.0L Turbo LTG engine.)"