Milltek Sport Non-Resonated Secondary Catalyst Bypass for the BMW G8X M3 and M4. Manufactured from premium T304L aircraft-grade stainless steel with mandrel-bent pipework for maximum flow and a louder, more aggressive sound.
Key Features: - T304L stainless steel construction - Mandrel-bent pipework for optimal flow - Non-resonated for a louder, sportier tone - Direct fitment to OE downpipes
