Vibrant Female AN to Hose Barb 45 Degree Adapter, AN Size: -8AN; Barb Size: 1/2" - 12018 .051" From there

From there

5" adapter that tapers down to be used with the factory downpipe or can be used without the adapter and bolted directly to the COBB 3" downpipe

BMW 1-series (2004 - 2014)

ZX4-HDR4 kit features ACT's most popular Heavy Duty pressure plate

Ideal for carbureted or EFI vehicles

Vibrant Female AN to Hose Barb 45 Degree Adapter, AN Size: -8AN; Barb Size: 1/2" - 12018 .051" From thereVibrant Performance Female AN Flare to Hose Barb Adapters are lightweight and constructed from 6061 Aluminum Alloy. Our Female AN Flare to Hose Barb Adapters deliver quality, reliability, smooth flow, ease of assembly and the comfort of an anti leak seal and are designed to fit most popular oil pumps, fuel pumps, fuel filters and a wide range of other common components. All Vibrant Performance Adapter Fittings are available in anodized black only.