The Milltek Sport Large-Bore Downpipe with Hi-Flow Sports Cat delivers improved performance and a deeper exhaust tone. Its larger diameter reduces back pressure, allowing exhaust gases to flow more freely and boosting engine efficiency. When combined with the Hi-Flow Sports Cat, it provides maximum power gains and a sportier driving experience. Built for enthusiasts who want to unlock their car’s full potential with reliable, long-lasting performance. Specifications - Pipe diameter (inches): 3.15 - Feature 1: Including GPF bypass - Feature 2: Requires Stage 2 ECU Remap - Feature 3: Fits to OE and Milltek Sport Systems