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 V35 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 3/4" ID hose system - Replacement for OEM part #92500-AR000 and #92500-JK20A Fittings: Coolant bleeder port CAP - Off the shelf O ring used to seal. No need to rely on an NPT bung, or copper washers - Slotted bleeder plug to make bleeding easier than ever Coolant bleeder port BARB - For use with coolant swirl pots - 5/16" barbed outlet   Vehicle Compatibility: - Nissan Z33 350z - Nissan Z34 370z - Nissan V35 Skyline - Nissan V36 Skyline - Infiniti G35 - Infiniti G37