Eventuri BMW G01 X3 & X4 M40i B58 Carbon Fibre Intake System

Experience a new standard in performance and craftsmanship with the Eventuri BMW G01 X3 & G02 X4 M40i B58 Carbon Fibre Intake System, meticulously engineered for the B58D engine variant. This premium intake system transforms the driving dynamics of your X3 or X4 M40i by enhancing airflow efficiency, maintaining low intake air temperatures (IATs), and unlocking consistent, repeatable power gains — all while preserving OEM fitment and reliability.

Developed through extensive flow bench testing and real-world evaluation, Eventuri’s fully sealed carbon fibre intake ensures the turbocharger receives a smooth, unrestricted supply of cold air. Unlike open intakes that allow heat soak from the nearby exhaust manifold, this system uses a sealed airbox design with an integrated gold-backed heat shield, dramatically reducing radiative heat transfer. The result is cooler, denser air reaching the turbo, improving throttle response and maintaining performance even in high-temperature conditions.

The prepreg carbon fibre airbox is both functional and visually striking, crafted with aerospace-grade precision for superior thermal resistance and airflow efficiency. Its internal geometry has been optimised to increase internal volume while integrating perfectly around the factory strut brace. Inside, a custom high-flow dry cone filter provides exceptional filtration area and ISO-certified efficiency, ensuring maximum airflow without compromising engine protection.

The intake tube itself represents a major step forward in design. Replacing the restrictive OEM plastic hose, Eventuri’s carbon tube measures 109mm (4.3”) in diameter, providing an 82% larger cross-sectional area compared to stock. The smooth internal surface minimises turbulence, while the tapering design transitions perfectly to the turbo inlet for laminar, consistent airflow. Precision-machined fittings accommodate the OEM temperature sensor and breather adapter, maintaining full factory functionality.

Every detail, from the CNC-machined components to the laser-cut stainless-steel brackets, reflects Eventuri’s commitment to engineering excellence. The result is an intake that not only increases power and responsiveness but also enhances engine sound and under-bonnet aesthetics — the ultimate blend of performance and craftsmanship for discerning BMW owners.

Key Features

• Designed for BMW G01 X3 M40i & G02 X4 M40i (B58D engine)

• Sealed carbon fibre airbox to prevent heat soak and ensure consistent cold air delivery

• Gold-reflective heat shield minimises radiative heat from the exhaust manifold

• 109mm carbon fibre intake tube (4.3”) with an 82% larger cross-sectional area than stock

• Bespoke high-flow dry cone filter – ISO-certified for optimal filtration and flow

• Smooth internal surfaces for laminar, turbulence-free airflow

• Precision CNC-machined fittings for temperature sensor, breather, and turbo flange

• Laser-cut stainless-steel brackets and OEM-spec silicone couplers

• Made entirely from 100% prepreg carbon fibre, not fibreglass

• Direct fitment with no modification required

What’s Included

• Carbon fibre airbox assembly

• High-flow dry cone air filter

• Carbon fibre intake tube

• CNC-machined temperature sensor mount

• CNC-machined breather adapter

• CNC-machined turbo flange

• Heat shield with gold reflective backing

• Laser-cut stainless-steel brackets

• Silicone coupler and OEM clamps

• Full fitting hardware and installation guide

Compatibility

• BMW G01 X3 M40i (B58D engine)

• BMW G02 X4 M40i (B58D engine)

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