If you mean the heater core shutoff valve, any 5/8" will do (watch size of vacuum nipple -- 1/8" or so). I used Factory Air #74612, stocked by both Autozone and Advance. Differs in appearance from factory (single piece step down). Is long lived however -- use same part number on all my Lincolns. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "ablemanse" <s.ableman@xxxx> wrote: > Hi, > > Somewhere I saw a after market heater control valve but now that I > need one I can't find it. Was it a Subaru? I've looked in the archives > and saw that someone bought one at NAPA but he didn't say what it was > ment for. > > TIA Steve 1089