BMW X4 M40i Performance Exhaust - Dinan - Axleback Exhaust System - Polished - `19-`25
BMW X4 M40i Performance Exhaust - Dinan - Axleback Exhaust System - Polished - `19-`25
Available Options
Drive now, Pay later with Affirm
or with PayPal
Both options will be available upon checkout.
BMW X4 M40i Performance Exhaust - Dinan - Axleback Exhaust System - Polished (2019–2025). A premium, valved axle-back engineered to unlock a deeper, sportier soundtrack while preserving everyday refinement.
Developed specifically for the G02 X4 M40i, this Free Flow axle-back replaces the rear section with a T304 stainless, TIG-welded assembly and a Helmholtz-equipped muffler to curb drone. Factory valve control is retained, letting you cruise quietly with the valve closed or enjoy a more assertive tone with it open. Quad 3.75-inch double-walled polished tips with laser-engraved Dinan logos complete the package, providing OE-like fitment via factory mounting points—no cutting or welding required.
Features
- Axle-back, valved design for 2019–2025 BMW X4 M40i (G02, including LCI)
- 100% T304 stainless steel construction, TIG welded
- Helmholtz muffler technology to reduce cabin resonance
- Quad 3.75 in. polished clamp-on tips with laser-engraved logos
- Direct bolt-on using factory hangers and valve hardware
- Louder, deeper tone with refined manners when closed
Questions or need guidance on fitment, sound, or install? Call our performance team in Austin, TX at 512-982-9393 or in the Los Angeles, CA area at 562-981-6800. We offer professional installation and customization at both locations.
Considering multiple items? Contact us for shipping discounts. We install on premises at both locations.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Need Assistance?
We're here to help!
Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
Product ID Number: