BMW G42 M140i / M240i / M340i / M440i

G Series B58 Infinity Intake System – High-Flow Performance & Smooth Throttle Response

Upgrade your BMW G Series B58 engine with our high-performance Infinity intake system, engineered to deliver maximum airflow, low intake temperatures, and enhanced throttle response. Built on the same principles as our A90 Supra intake, this system improves power and drivability throughout the RPM range while giving a stunning under-bonnet appearance.

DESIGN & FEATURES

• Large Volume Airbox & Venturi Inlet Tube: Optimized to maintain smooth airflow and accelerate air into the engine efficiently.
• High-Flow 170mm Air Filter: Short-stack, high-surface-area filter larger than any cone filter design, strategically positioned for the largest velocity stack.
• Dual Cold Air Feeds: Two fully optimized air ducts ensure maximum intake of cool air, matching OEM intake temperatures while allowing more airflow for performance gains.

PERFORMANCE TESTING
Independent Dynojet testing confirms 12–16 hp and 10–15 lb.ft gains, with faster turbo spool and improved torque throughout the RPM range. The system provides smoother, more eager throttle response and a refined induction sound under load.

WHAT’S IN THE BOX
✅ 1 x Venturi Inlet Tube
✅ 1 x Frontal Right Air Tube
✅ 1 x Air Filter Housing / Inlet Duct
✅ 1 x Bespoke Infinity Design Air Filter
✅ 1 x Black CNC Turbo Adapter
✅ 1 x Silicone Joiner with Clamps

Enhance your B58 engine with an intake system that combines precision engineering, high-flow performance, and real-world drivability.