As with almost all products we design, they're made from actual need from our own personal experience. Whilst doing a quick coolant bleed on our low km BRZ development vehicle recently, the factory plastic bleeder port decided to self destruct into small fragments. With the prospect of the OEM plastic unit doing it again, we decided to make our own CNC machined aluminium version. To make life easier, we've also slotted the bleeder plug so that it doesn't need to be removed all the way to bleed the system. Being aluminium, this unit is guaranteed to last for life. - CNC Machined aluminium construction to ensure longevity - Will suit any 5/8" ID hose system Vehicle Compatibility: - Scion FR-S - Subaru ZC6 BRZ - Toyota ZN6 GT86