Thermostat rubber ring: Cosworth YB 2wd & Ford SOHC Pinto
 
Thick rubber seal that fits inside housing. Not RS500.
Ford SOHC Pinto
Application:
Ford Capri Mk1/Mk2/Mk3 1.6/2.0 1972-1987
Ford Cortina Mk3/Mk4/Mk5 1.6/2.0 1970-1982
Ford Escort Mk1 RS2000 2.0 1973-1974
Ford Escort Mk2 RS2000 2.0 & Mexico 1.6 1975-1980
Ford Granada Mk2 1.6/2.0 1977-1985
Ford Granada/Scorpio Mk3 1.8/2.0 1985-1989
Ford Sierra 1.6/1.8/2.0 1982-1989
Ford Transit Mk2/Mk3 1.6/2.0 1978-1994
TVR Tamsin 200 2.0
Ford Cosworth YB 16v Turbo
Application:
Ford Sierra RS Cosworth 3 door 1986-1987
Ford Sierra Sapphire RS Cosworth 2wd 1988-1989
 
YBTHERMOSORING