This Litens tensioner is supplied by the original equipment manufacturer and meets all form, fit, and performance characteristics of the original equipment part . Like the O.E. construction, the Litens replacement part is constructed of light weight/durable aluminum for long life and trouble free performance. Designed for Audi/Porsche applications. Litens is the world's largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.