The 2002-2005 Audi A4 quattro combines timeless Audi design, turbocharged performance, and legendary all-wheel-drive capability. Enhance your A4 quattro with APR performance upgrades, including ECU tuning, intake systems, exhaust upgrades, turbocharger enhancements, and supporting hardware engineered to increase power, improve responsiveness, and maximize driving enjoyment.

APR’s brake systems bring refined European engineering to braking — from advanced street-pads and direct-replacement rotors to full-big-brake kits featuring billet calipers, floating rotors and braided steel lines. Designed for daily driving, spirited use and track duty.