Koflach Engine Developments billet aluminium coolant expansion hose fitting for E46 M3.

Thanks to heat and the stiff type of plastic used by BMW for the expansion hose on E46 M3 – which runs from the top radiator hose to the top of the expansion tank – it becomes brittle over time and is easily broken.

To solve this, KED developed a billet fitting for the upper radiator hose that then allows a 8mm I/D flexible hose to be used.

Choose between either the billet fitting only, or complete kit which includes 2m of EPDM rubber heater hose and Herbie clips for neat and easy assembly.

Find out more about KED here.