Corsa 2021-2023 Suburban / Yukon XL 6.2L 4WD Dual Rear 3in to 2.75in Sport Cat-Back DW 4in BLK TipsCorsa 2021 2023 Suburban Yukon XL 6. 2L 4WD Dual Rear 3in to 2. 75in Sport Cat Back DW 4in BLK Tips dB by CORSA's patented Reflective Sound Cancellation(R) (RSC) Technology allows acoustic engineers to create a drone free exhaust sound, and a deep aggressive rumble. Computerized; mandrel bent; straight through design for maximum airflow which improves fuel economy and performance. 3. 5in. to 2. 75in. Dual Rear Exit Cat Back Exhaust System