The ARM Motorsports 340i/440i Midpipe is designed to elevate the exhaust tone and performance of your B58-powered BMW. By removing the two large factory resonators, this midpipe unlocks a deeper, more aggressive exhaust note while maintaining full compatibility with the OEM muffler. In Sport Plus mode, the upgraded system delivers a sharp, spirited B58 tone, while Comfort mode keeps the sound refined for daily driving.

Engineered for precise fitment, the ARM Midpipe sits cleanly within the underbody exhaust channel and maintains proper clearance even on lowered vehicles. The system is compatible with both the OEM downpipe and any aftermarket downpipe designed to work with the factory midpipe connection points.

Constructed from premium SS304 stainless steel, the midpipe features smooth mandrel-bent 3.25-inch tubing from the downpipe all the way to the muffler. The two-piece design includes a front and rear section joined by a durable slip-fit connection and high-grade exhaust clamps, ensuring a secure and leak-free installation. This upgrade reduces weight compared to the OEM system while dramatically improving sound and flow characteristics.

Fitment:

Fits BMW models equipped with the B58 3.0L engine:

• BMW F30 340i (B58)
• BMW F30 340i xDrive (B58)
• BMW F32 440i (B58)
• BMW F32 440i xDrive (B58)
• BMW F34 340i Gran Turismo (B58)
• BMW F34 340i Gran Turismo xDrive (B58)
• BMW F36 440i Gran Coupe (B58)
• BMW F36 440i Gran Coupe xDrive (B58)