Description
The Dinan axle-back exhaust changes the sound and rear appearance of 2017-2023 BMW 540i. This version supplies black-finished exhaust tips.
The revised muffler and tubing are developed for a more pronounced exhaust tone. A Helmholtz chamber addresses a targeted resonance range; the original computer-controlled exhaust valve is removed in this configuration.
Technical details
- Factory exhaust valve: eliminated by this system.
- Construction: T304 Stainless Steel.
- Tip finish: black.
- Listed vehicle application: 2017-2023 BMW 540i.
- Manufacturer part number: D660-0078-BLK.
Fitment and installation
- Confirm body style, drivetrain and the original rear-valance configuration. Review the installation procedure for cutting, joining and valve-transfer requirements.
- A stronger exhaust note does not mean zero cabin resonance; other modifications can change the sound substantially.
- Not compatible with the BMW M Performance rear diffuser.