Where is it sold? I have never seen it. But I have replaced two radiators and two water pumps on 123s, all at the least convenient times and places. Anything that prolongs the life of the cooling system, not to mention the a/c, is worth $25 a gallon.
Stage Wizards Lighting and sound designer
1981 SD 328,000
1985 300TD, 266,000
1984 300 TD, 267,000