Large Bore Downpipe and Hi-Flow Sports Cat - Fits with Milltek Cat Back (Golf Mk8 R/Audi S3 8Y)Milltek Sport Large Bore Downpipes are perfect when looking to improve both performance and sound. These downpipes are fabricated with a larger diameter than standard OEM parts, meaning that there is significantly more space for more gas to exit the engine and pass through, increasing efficiency. 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,