April 8, 200520 yr I changed the t-stat and all they had and "recommended" at the parts store for my 88 dl was a 195 degree. I want to put in a 180 but I guess I will need a size right? Is it a 54? - Chris
April 8, 200520 yr yes subaru is 54 mm. Along with with miles said.. so go ask for a 180 degree chevy 350 thermostat. Make sure to read and make sure they dont give you a 56 mm big block thermostat
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