FYI we no longer sell race fuel.
This Valve is naturally Open,when vacuum is applied, Valve Closes. The valve is naturally open allowing heat to enter the vehicles heater core. 5/8" Inlet and Outlet
You Need To CHECK Your Vehicle And Your Current Heater Valve's Action, & Make Sure That The OPEN/VACUUM & CLOSED/NO VACUUM Positions Are The Same As This!..To Insure You Receive The Correct Heater Valve. **PLEASE CHECK YOUR VALVE BEFORE ORDERING**
