Dinan Free Flow Axle-Back Exhaust System with Black Tips for BMW 340i / 440i (F30/F32) 2016-2020

Special Note: Factory computer-controlled exhaust valve is eliminated.

Dinan engineers developed the F30 BMW 340i and F32 BMW 440i Free Flow Axle-Back Exhaust to enhance exhaust flow by reducing back pressure, leading to improved power output and a dynamic, sporty sound. This system is designed to strike a balance between civility during daily driving and an aggressive tone under hard acceleration. Additionally, the signature burbles and pops that come with the exhaust sound are captivating for enthusiasts. To maintain comfort inside the cabin, Dinan incorporates a Helmholtz chamber to mitigate drone at low RPMs.

Built to exact specifications for perfect fitment using the factory hangers, the system is crafted from 100% 16-gauge 304 stainless steel, offering excellent durability and corrosion resistance. The exhaust exits through twin 89mm (3.5") laser-engraved exhaust tips, available in polished stainless or ceramic black for a sleek and performance-oriented aesthetic. The factory computer-controlled exhaust valve is removed to optimize airflow throughout.

Key Features:

• Power Gains: +6 HP at 6600 RPM, +5 lb-ft of torque at 6600 RPM
• Helmholtz Chamber: Reduces drone for enhanced cabin comfort
• Sound Profile: Louder, sportier sound with intoxicating burbles and pops
• Exhaust Tips: Twin 89mm (3.5") laser-engraved, available in polished or ceramic black finishes
• Material: 100% 16-gauge 304 stainless steel for long-lasting corrosion resistance
• Fitment: Utilizes factory brackets and hangers for an OEM-like installation