My 16-valve racecar has had the RENNtech rear control arm kit on it for three years, with no problems. I also removed the 4 rubber rear sub frame bushings and had some made from 6061 T-6 aluminum. I can't tell you if it would be a good idead for a street car because it probably transfers quite a bit of road noise into the car. I don't hear it in the racecar because the exhaust is so loud.

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