these are the 80 durometer type, installed for ~10 miles before I decided I couldn't take the racket or vibrations. ECS calls these 'street/track' they are most definitely 'track-only'. their statement 'small compromise in ride comfort' is laughable.
But, if you are building a TRUE track car, these are for you!
ECS wont take mine back so, my loss is your gain. they charge $70 shipping. how about $50 shipped?
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