3.5-Inch T304 Stainless Steel Cat-Back Exhaust

The Valvetronic Designs cat-back exhaust system is engineered to unleash the full potential of your BMW G01 X3 M40i's B58 engine. This system is meticulously constructed from T304 Stainless Steel for durability and optimal performance. It features a precision-engineered 3.5-inch midpipe designed to maximize exhaust flow, contributing to sharper throttle response and improved driving dynamics. Experience complete versatility with the dual actuated valves. When valves are open, enjoy full-throttle excitement with unrestrained volume and character. When valves are closed, the system provides a refined and quiet tone, perfect for daily driving or early morning starts. The significant dB difference between modes offers comprehensive control over your M40i's soundtrack, managed via an included standalone valve controller. This exhaust system is not only about sound but also about performance. The maximized piping diameter and fully mandrel-bent construction ensure maximum flow efficiency, allowing the engine to breathe freely. Weighing 25.5 lbs less than the factory exhaust, it contributes to better overall dynamics. The system is 100% reversible, allowing for a return to stock configuration at any time. Available tip options include Black and 1X1 Carbon Fiber.