If you want more turbo sound without sacrificing performance, the Dinan Semi-Open Carbon Fiber Intake is the perfect solution for BMW B58-powered F2X and F3X models.

Based on Dinan’s highly acclaimed closed-box intake system, this semi-open version adds a revised lid with an integrated sound port that allows the turbocharger and induction system to be heard far more clearly. The result is a louder, sharper and more engaging driving experience while retaining the proven airflow and performance benefits of the original design.

This intake features a 30% larger airbox and a high-flow filter with 34% more filter area than stock for greater breathing capacity and improved efficiency.

Dinan also redesigned the intake tube in carbon fiber, removing the restrictive factory baffling and Helmholtz chamber that create turbulence and suppress sound. Combined with the freer-flowing 8% larger air mass meter housing, the intake delivers gains of up to +15 HP and +13 lb-ft of torque at 6000 RPM on a stock vehicle.

Constructed entirely from premium carbon fiber, the system dramatically improves engine bay appearance while offering durability designed to last.

For maximum sound enhancement, it can also be paired with the optional Dinan turbo inlet to upgrade the full intake path to the turbocharger.

Key Features

• Up to +15 HP and +13 lb-ft torque
• Semi-open design for louder turbo sound
• Improved throttle response
• 30% larger airbox volume
• 34% larger filter area
• Optimised carbon fiber intake tube
• 8% larger air mass meter housing
• Full carbon fiber construction
• Optional turbo inlet compatibility
• Quick and easy installation

Compatibility

• BMW F20 M140i
• BMW F21 M140i
• BMW F22 M240i
• BMW F23 M240i Convertible
• BMW F30 340i
• BMW F31 340i Touring
• BMW F32 440i Coupe
• BMW F33 440i Convertible
• BMW F36 440i Gran Coupe