This is a direct replacement IAG V3 AOS 20" Coolant Line that is included with Street Series & Competition Series air oil separators with Part Numbers IAG-ENG-7180, IAG-ENG-7181, IAG-ENG-7280, IAG-ENG-7281. The 1/2" heater hose is 20 inches in length and features a preassembled replacement banjo style coolant fitting with Viton O-rings.