Apex Tuning Performance, Service, Repair, and Maintenance for Volkswagen, Audi, and Porsche Reach Out About Us 16+ years of Outstanding VW/Audi/Porsche Service in RDU We are Apex Tuning! The VW/Audi/Porsche specialist covering Service, Repair, Maintenance, Diagnostics and Performance Tuning.. Based in Apex, NC we are just a short drive from anywhere in the triangle region.The