My engine was squeaking. After testing and replacing parts, it turned out it wasn't the belt tensioner or some of the pulleys were defective. I had a slight pulley misalignment somewhere. This put additional stress on the belt and made it squeak. With a ribbed design, this belt did the job perfectly. As soon as I put it on the problem went away and now I can drive without my ears bleeding. I would use this belt again, no question.
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