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The OEM timing belt tensioner is made from cast aluminum. As the power produced by the 2JZ engine increases, this weak material is no longer adequate. Powerhouse not only solved this problem, but we attacked it with a 10lb sledgehammer.
The PHR Timing Belt Tensioner is made for 4130 Chromoly Steel. This is not only a superior material to the cast aluminum, but is even stronger than standard steels.