Eventuri Carbon Fiber Plenum for E9X M3 – S65 V8 Induction Sound Upgrade
Chris McGuire June 06, 2025
Few BMW engines have captivated enthusiasts like the naturally aspirated S65 V8—and nothing amplifies that experience quite like the Eventuri carbon fiber plenum. Crafted entirely from high-grade prepreg carbon fiber, including internally molded trumpets, this plenum replaces the factory plastic unit and unlocks the raw, unmistakable induction sound that defines the E9X M3 driving experience.
While the plenum does not increase performance figures on its own, its impact is immediate. The carefully tuned carbon construction transforms the already iconic sound of the S65 into something more visceral—evoking the tone and character of a CSL-style intake. Through extensive development, Eventuri experimented with various carbon thicknesses to achieve the ideal balance of volume and tonal quality. The final result delivers an aggressive, high-pitched intake note that’s both refined and intoxicating behind the wheel. Maintaining BMW’s original trumpet length and internal volume was a key part of the design process, ensuring that power delivery and drivability remain unchanged. This level of engineering precision is part of why this plenum remains one of IND’s most requested Eventuri components to this day.
For those looking to complete the system, Eventuri also offers a matching E9X M3 carbon fiber cold air intake, which includes a specially developed carbon scoop designed to smooth airflow through the factory front bumper duct. Paired together, the intake and plenum create a package that not only elevates engine bay aesthetics but enhances induction acoustics and airflow efficiency. It’s no surprise this combination has become a go-to for E9X M3 owners who want more than just performance—they want character.
Compatibility:
This carbon fiber plenum is designed to work seamlessly with the OEM airbox or any compatible aftermarket intake system.
Included Components:
- One-piece bonded carbon fiber base and lid
- (8) Carbon fiber intake trumpets, built to OEM specifications
- (8) CNC-machined aluminum velocity stack flanges
- CNC-machined temperature sensor boss
- CNC-machined breather boss
This photo series showcases the plenum paired with optional upgrades, including the Eventuri carbon fiber cold air intake, carbon fiber airbox lid, and carbon fiber front ducts.
