No matter the condition of your 2015 CTS, OPGI has the Exhaust products you need to boost performance and get you back on the road. We currently carry 121 Exhaust items to choose from for your 2015 CTS, and our Price Match Guaranteed prices range from as little as $2.99 up to $2,829.99. OPGI offers Magnaflow plus ten other trusted brands of Exhaust products for your 2015 CTS, to help you find quality parts you can rely on. With OPGI's 45-day return policy and thousands of customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Exhaust items in person.