High Flow Middle Exhaust

The Dinan High Flow Middle Exhaust is a direct-fit replacement mid-pipe designed to enhance the external acoustics of your G8x BMW M3 or M4. This system elevates the exhaust tone and increases volume over the stock setup while retaining the factory muffler, offering a budget-friendly upgrade. Constructed from 3-inch (76mm) T304 stainless steel tubing, this mid-pipe replaces the factory center section from the secondary catalysts back to the axle-back, including both resonators. Dinan incorporates a specially crafted X-pipe made from mandrel-bent tubing to minimize restriction and promote even exhaust flow to both banks of tips. This design reduces unwanted sound nuances often found in stock systems, resulting in a louder, smoother, and fuller exhaust note. The system's construction features 100% 304 stainless steel tubing and replaces the stock resonators for increased volume. It is also 5 pounds lighter than the factory mid-section, weighing 17 pounds compared to the stock 22 pounds. The recommended labor time for installation is 1.5 hours. This mid-pipe is confirmed to fit with Dinan Free Flow Axle Back and stock exhaust systems (including M Performance axle-back units). Fitment with other axle-back exhaust systems may vary. It is specifically designed for 2021-2026 BMW M3 and M4 models (G80/G82/G83).