BMW E90/E92 M3 - Large Bore Dowpipe Product Overview This Milltek Sport performance exhaust product is designed for the BMW E90/E92 M3 in the Large Bore Dowpipe configuration. It has been developed as a vehicle-specific upgrade to improve exhaust flow; sound and/or appearance depending on the configuration shown in the product title. Product Details OEM Catalysts are commonly very dense and restrictive on gas-flow. The Milltek Hi-Flow Sports Catalyst reduces the restriction over the OE catalysts; allowing for a free-flowing exhaust system to improve your engine’s performance. This Hi-Flow Sports Cat comes equipped with a downpipe; designed to improve the gas-flow and maximise the effect of the sports cat. All our performance exhaust systems are designed with you in mind; and we cater to an ever-expanding range of vehicles. We believe in continuous evolution; and our research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements. All of our products are made in the UK and distributed to more than 90 countries worldwide; making Milltek Sport one of the most accessible performance aftermarket brands on the market. - Requires Stage 2 ECU Remap. Key Features Vehicle-specific Milltek Sport fitment for the application shown above. Manufactured from high-quality 304L stainless steel for corrosion resistance and long-term durability. Designed and manufactured in the UK by Milltek Sport. Engineered as a performance exhaust upgrade with fit; flow and sound in mind. Professional Fitting Fitting is available - please contact us for a quote.