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The addition of Silicon as an alloying element to the Aluminium Tin family of bearing materials has elevated it to the next generation of performance materials. This is currently the choice of most OE manufacturers as the global mandate to have Lead free vehicles is enforced. An added benefit of the Aluminium Tin Silicon bearings is the excellent wear resistance properties, extending the service life of these parts.
However, BEWARE! Not all Aluminium Tin Silicon bearing materials are the same. The select alloying elements and heat treatments used by ACL have been proven by rigorous OE testing to go the distance, and they are truly lead free.