BMW G8X M3/M4 - Secondary Catalyst Bypass - X Pipe to Milltek Axle Back Only Audi > R8 > V10 5.2 FSI quattro Coupe�� and Spyder (excludes V10 Plus models) > 2009 to 2012 Very low leak down [4%]

Very low leak down [4%] after controlled test bed running

This is a replacement panel filter for VAG vehicles

The hose is supplied with a pair of high quality Stainless Steel W2 hose clamps replacing the difficult to use OEM spring clamps

Full fitting kit with every bolt/clips/brackets

Full fitting kit and instructions

BMW G8X M3/M4 - Secondary Catalyst Bypass - X Pipe to Milltek Axle Back Only Audi > R8 > V10 5.2 FSI quattro Coupe�� and Spyder (excludes V10 Plus models) > 2009 to 2012 Very low leak down [4%]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. Used with our Catalyst Bypass Pipe, you can expect significant power gain without any restriction on gas flow made by a catalyst. All our performance exhaust