Material: Forged 4340 steel. For Audi A3 1.8 20vT AGU/ARZ/ARX/AUM/AQA 1996–2003. For Audi TT Quattro 1.8T BAM AEB. For Audi S3 1.8 20vT APY AMK 1999–2001. For Audi S3 1.8 20vT BAM AEB 2001–2003. XR AUTO PARTS - We have been specializing in automotive parts for over 20 years.