⚠ U.S. Spec Only This intake is designed specifically for U.S.-spec vehicles. It features additional CNC machining and different silicone couplers compared to Euro-spec. Please confirm your vehicle specification before ordering. Contact us if you're unsure.
MST Items can take up to 4 weeks to fulfill due to demand
Overview
The MST BW-B4806 is a purpose-built cold air intake system engineered for the BMW G20/G21 330i and related B48 2.0L chassis. Featuring a G-Chassis dedicated airbox design, 89mm intake piping, and a reusable high-flow dry filter, this kit delivers measurable power gains while enhancing the intake and turbo spool sounds your B48 is capable of producing. Fully compatible with your OEM MAF sensor; no additional modifications required.
Performance Gains
8–10
Horsepower Gain
+12
Nm Torque Gain
89mm
Intake Pipe Diameter
Key Features
✓BMW G-Chassis dedicated airbox
✓Compatible with stock MAF sensor
✓89mm intake piping
✓89mm high-flow dry air filter
✓Reusable & cleanable filter media
✓More aggressive intake sound
✓Enhanced blow-off valve tones
✓Improved turbo spool response
✓CNC machined aluminum components
✓Direct OEM replacement fitment
Product Specifications
Part Number
BW-B4806
Brand
MST Performance
Pipe Diameter
89mm
Filter Type
Dry, High-Flow, Reusable
Power Gain
+8–10 HP
Torque Gain
+12 Nm
MAF Sensor
OEM compatible — no modification required
Material
CNC aluminum & silicone couplers
Filter Service
Clean every 20,000 km · Replace at 60,000 km
Spec
U.S.-spec vehicles only
Vehicle Fitment
B48 2.0L EngineG20 / G21G26G422018–2025U.S. Spec Only
Year Range
Model
Chassis
Engine
2018–2025
320i / 330i
G20 / G21
B48 2.0L
2019–2025
420i / 430i
G26
B48 2.0L
2021–2025
220i / 230i
G42
B48 2.0L
* Not compatible with Euro-spec vehicles. If you're unsure of your vehicle's spec, contact us before ordering.
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TERMS (REQUIRED)
OFF-ROAD USE POLICY & EMISSIONS COMPLIANCE NOTICE
California Proposition 65 Warning:
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of
California to cause cancer or birth defects or other reproductive harm. For more information, visit
www.P65Warnings.ca.gov.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell,
install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public
roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB),
it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Civil penalties up to $4,819 per violation per vehicle
Possible criminal penalties under the Clean Air Act
Revocation of registration or smog certification by DMV or local authorities
State & Local Regulations:
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local
regulations before purchasing or installing emissions-related products.
Intended Use & Customer Certification:
All performance, racing, or competition parts sold by this company are intended solely for off-road,
closed-course, or competition use on vehicles that are never registered or used on public highways.
Company Policy Statement
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the
use of emission-control defeat devices or any modification that violates the Clean Air Act or state
regulations.