The G42 B58 Eventuri intake was developed to provide the turbo with a less restrictive flow path while maintaining low inlet temperatures. Heat and volume are the primary considerations when designing an intake for turbocharged engines. In the M240i, the intake system is located adjacent to the exhaust manifold, which quickly absorbs heat from the engine bay.
High temperatures are detrimental to engine performance, as the turbo is supposed to build boost with heated, less dense air. Therefore, the only way to minimize IATs is with a completely sealed intake. This, however, results in restriction with only one stock air feed to draw air from. During development, we noticed an additional opening in the wheel arch area and took advantage of this by adding a secondary feed to our airbox.
In addition, our sealed airbox also features a gold-tinted heat shield to minimize radiative heat transfer from the exhaust manifold. To maximize volume we made the airbox as large as possible with a recess for potential strut braces. The stock convoluted intake tube is replaced with a smooth carbon tube that is also larger in internal volume, with an initial internal diameter of 111 mm (4.4″) that tapers gently to fit the turbo inlet. The tube provides a smooth path from the filter to the turbo inlet. Finally, we use a custom high-flow dry filter that is ISO-tested for filtration performance and has a larger filtration area than the original filter.
To maximize volume, we made the airbox as large as possible with a recess for potential strut reinforcements. The stock convoluted intake tube is replaced with a smooth carbon tube that is also larger in internal volume, with an initial internal diameter of 111 mm (4.4″) that tapers gently to fit the turbo inlet.
The tube provides a smooth path from the filter to the turbo inlet. Finally, we use a custom high-flow dry filter that is ISO-tested for filtration performance and has a larger filtration area than the original filter. To maximize volume, we made the airbox as large as possible with a recess for potential strut reinforcements. The stock convoluted intake tube is replaced with a smooth carbon tube that is also larger in internal volume, with an initial internal diameter of 111 mm (4.4″) that tapers gently to fit the turbo inlet. The tube provides a smooth path from the filter to the turbo inlet. Finally, we use a custom high-flow dry filter that is ISO-tested for filtration performance and has a larger filtration area than the original filter.
The Eventuri G42 B58 intake system is made up of a series of components designed for a specific purpose and manufactured to the highest standards. We use 100% pre-preg carbon fiber with no fiberglass, which means we can achieve a smooth internal surface for smoother airflow. Below are the details for each component and the design ethos behind it.
Each intake system consists of:
Fiberglass airbox Dual-fuel carbon fiber filter
Custom-built high-flow dry cone filter
111mm internal diameter carbon fiber inlet pipe
CNC-machined temperature sensor mount
CNC-machined vent adapter
Gold-reflective heat shield
Laser-cut stainless steel brackets
CNC-machined turbo flange and custom silicone