Dinan Exhaust Systems
Fits 2019–2025 BMW X4 M40i
Part #: D660-0099-BLK
Overview
The Dinan Freeflow Axleback Exhaust System for the BMW X4 M40i is a high-performance upgrade designed for enthusiasts seeking an enhanced sound and weight reduction. Crafted specifically for the G01/G02 platform, this system replaces the factory exhaust with a freer flowing, straight pipe design that improves exhaust flow and reduces weight, contributing to a more dynamic driving experience. Its sleek black finish complements the vehicle’s sporty aesthetic, making it an ideal choice for those looking to combine style with performance.
This exhaust system is perfect for drivers who want a more aggressive sound profile without sacrificing daily comfort. Whether you desire a refined tone during cruising or a commanding roar when accelerating, the Dinan system offers versatile sound control. The retained factory valve functionality allows seamless transition between quiet and loud modes, and when paired with an exhaust valve remote, full control over the exhaust note is at your fingertips. The Helmholtz-equipped muffler helps to minimize drone frequencies, ensuring a pleasant cabin environment even at higher RPMs.
Key Features
This exhaust system is engineered with several key features to enhance your vehicle’s performance and sound:
- Constructed from durable, high-quality materials designed for longevity and corrosion resistance
- Enlarged, straight, unrestricted pipe for maximum exhaust flow and weight savings
- Helmholtz muffler technology to reduce drone and optimize tonal quality
- Retains factory valve operation for adjustable sound levels
- Black finish provides a sleek, aggressive look that complements the vehicle’s styling
- Designed specifically for the BMW X4 M40i (2019–2025 models)
- Easy bolt-on installation with no modifications required
Construction & Design
The Dinan Freeflow Axleback Exhaust System features a robust, high-grade stainless steel construction with a matte black finish, ensuring durability and corrosion resistance. Its streamlined design eliminates the central resonator and collector, replacing them with a larger, straight pipe that promotes unrestricted airflow. The Helmholtz muffler is precisely engineered to balance performance and sound quality, reducing unwanted drone while enhancing the exhaust tone.
Driving Feel & Feedback
This system enhances the auditory experience of your BMW X4 M40i, delivering a deeper, more aggressive exhaust note that responds dynamically to throttle input. The no-nonsense design supports improved exhaust flow, which can contribute to a slight increase in responsiveness and a more engaging driving experience. The ability to switch between quiet and loud modes allows you to tailor the sound to your mood or driving environment, making every drive more enjoyable.
Installation & Fitment
Designed for a straightforward bolt-on installation, this exhaust system fits 2019–2025 BMW X4 M40i models without requiring modifications. Proper tools and basic mechanical skills are recommended for installation, which can typically be completed in a few hours.
What’s Included
The package includes the axleback exhaust pipes, mounting hardware, and detailed installation instructions, ensuring a hassle-free upgrade process.
