Agency exhaust (original catback) Suitable for GMC Sierra cars (second generation) models: ✅ 2021 ✅ 2022 ✅ 2023 ✅ 2024 ✅ 2025 ✅ 2026 * Designed for cars with rear bumper outlets. * Suitable as a replacement for a damaged exhaust or to revert to agency specifications. (Sold)