Dinan High Flow Middle Exhaust for BMW M3 / M4 2021-2025

Note: 

The Dinan Middle Exhaust for the G80 M3 and G82/G83 M4 is crafted for drivers seeking to amplify the car's sound profile while keeping the stock muffler for a budget-conscious enhancement. This middle exhaust transforms the acoustics with a bolder, louder, and sportier tone, adding a level of sophistication while remaining upgradeable for those who may want to add the Dinan axle-back exhaust in the future for an even more aggressive sound.

The system replaces the factory center section from the secondary catalysts to the axle-back, including both resonators, with a 3" (76mm) T304 stainless steel piping that improves flow and sound quality. A key element is the custom Dinan X-pipe, which promotes even exhaust flow between both banks, minimizing unwanted acoustic irregularities often present in the stock setup.

Key Features:

• Enhanced Sound Profile:

  • Delivers a smoother, louder, and sportier exhaust tone by eliminating the factory resonators and adding an optimized X-pipe.

• Improved Flow and Power:

  • Replaces stock 2.75" (70mm) piping with 3" mandrel-bent tubing, reducing restrictions and backpressure.

• Custom X-Pipe Design:

  • The handmade X-pipe promotes balanced exhaust flow and a refined tone, outperforming common stamped X-pipes.

• Lightweight Construction:

  • Weighs 17 pounds, a 5-pound reduction over the stock system.

• High-Quality Build:

  • Constructed from durable 100% T304 stainless steel with factory-like fitment for longevity and performance.

• Easy Installation:

  • Includes mounting hardware for straightforward, bolt-on installation.