Description
The Mishimoto MMAI-G80-21CFM is a carbon fiber cold air intake system engineered specifically for the S58B30-powered 2021+ BMW G8X chassis, covering the M2, M3, and M4 lineup. Built from solid 3K twill-woven carbon fiber and precision-modeled with 3D printing, CAD, and flow bench technology, this air intake system was created after Mishimoto’s own engineering team acquired a G80 and set out to unlock more airflow from the S58 engine. The result is a dual-airbox design that reduces intake restriction by up to 13% on the driver side and 22.8% on the passenger side.
As a purpose-built cold air intake filter kit, this air intake system pairs carbon fiber airboxes and intake tubes with CNC-machined aluminum connectors for a leak-free, rigid installation that resists heat soak far better than plastic factory ducting. Dual high-flow oiled air filters increase filter surface area over the stock panel filters, while two additional ports open to the wheel wells to pull in cooler outside air. Beyond the airflow gains, drivers will notice an amplified turbocharger spool and bypass valve venting sound under acceleration, and the intake is designed to operate safely on a stock ECU tune.
Vehicle Applications
This Mishimoto cold air intake is a direct-fit upgrade for the S58B30-equipped BMW G8X platform (chassis codes G80, G82, G83, and G87). Confirmed applications include the BMW M2 Base (2023–2026), M2 Coupe (2023–2024, 2026), and M2 CS (2026); the M3 Base (2021–2024, 2026), M3 Competition (2021–2026), M3 Competition xDrive (2022–2026), and M3 CS (2024); as well as the M4 Base (2021–2026), M4 Competition (2021–2023, 2025–2026), M4 Competition Heritage (2023), M4 Competition xDrive (2022–2026), M4 CS (2025–2026), and M4 CSL (2023).
Features
- Constructed from solid 3K twill-woven carbon fiber, available in matte or gloss finish
- Reduces intake restriction by up to 13% on the driver-side tract and 22.8% on the passenger-side tract
- Includes dual high-flow oiled air filters with improved surface area over stock panel filters
- Additional fresh-air ducts draw cool air directly from the wheel wells
- Amplifies turbocharger spool and bypass valve venting sound under acceleration
- CNC-machined aluminum connectors for a leak-free, durable installation
- CNC-machined passenger-side turbo inlet improves flow and durability
- Precision-engineered using 3D printing, CAD modeling, and flow bench technology
- Provides safe operation on a stock ECU tune
- Installs in under 1 hour without removing the front bumper or undertray
- Washable oiled filters can be refreshed with a Mishimoto Filter Re-Oil Kit
- Covered by patents US 11,506,157 B2, US 11,773,813 B2, with additional patents pending
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMAI-G80-21CFM
- Product Type: Air Intake System
- Filter Material: Multi-layered cotton
- Filter Color: Red
- Hose Material: Carbon Fiber
- Hose Color: Black
- Grade Type: Performance
- Finish Option: Matte
- Engine Code: S58B30
- Chassis Codes: G80, G82, G83, G87
Frequently Asked Questions
What vehicles does this Mishimoto intake fit?
It fits the S58B30-equipped BMW G8X platform, including the M2 (2023–2026 depending on trim), M3 (2021–2026 depending on trim), and M4 (2021–2026 depending on trim), across chassis codes G80, G82, G83, and G87.
How much does it reduce intake restriction?
Mishimoto measured a 13% reduction in restriction on the driver-side intake tract and a 22.8% reduction on the passenger-side tract.
What air filters are included?
The kit includes dual high-flow oiled air filters made from multi-layered cotton with a red filter color, offering improved surface area and airflow over the stock panel filters.
Can this intake run on a stock ECU tune?
Yes, the system is designed to provide safe operation on a stock ECU tune.
How long does installation take?
Installation takes less than one hour and does not require removing the front bumper or undertray.
How do I maintain the oiled filters?
Mishimoto recommends cleaning and re-oiling the filters every 10,000–15,000 miles during normal driving, and inspecting more frequently in dusty or off-road conditions; filter re-oiling is not included under the Lifetime Warranty.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Not CARB approved. This item is not legal for sale or use on pollution-controlled motor vehicles in California or states that adopt California emissions standards. Intended for off-road / competition use where permitted by law.
