Does anyone know what the difference may be between two parts that are the same number except one will have a "Q" the other will have a "T" as the second to last digit? Example was a cap and rotor kit and for a 2000, 4.3L in an online quicksilver cat. Supposedly they will both fit but what's the diff if anything? Also noticed it with a thermostat kit too I think.
Thanks' to all
Thanks' to all