Carbon Fiber Engine Chassis Brace Set | BMW M240i/ M340i/ M440iCarbon Fiber Engine & Chassis Brace Set BMW M240i M340i M440i Sharper handling. Sleeker style. Built the CarBahn way. Transform the look and feel of your G series M car with CarBahns Carbon Fiber Engine & Chassis Brace Set. Engineered to increase structural rigidity and reduce chassis flex under load, these braces tighten up steering response while adding a motorsport aesthetic under the hood. Key Features Carbon Fiber Construction Lightweight, high