Header Exhaust Manifold Stainless Chrome for Audi S4/200 Quatro (1989-1997) with 2.2L L5 Turbo EngineHigh Flow Racing Turbo Manifold for the Audi 2. 2L 20V Turbo (AAN 3B Engine) Who Its For: Engineered for Audi S4, S6, and 200 Quattro owners running the legendary AAN or 3B 20 valve inline five powerplant who want to unlock the true potential of their turbo system. The Symptom: The factory exhaust manifold on the Audi 2. 2L turbo engine is a notorious bottleneck. Designed for mass production and extreme sound dampening, the stock cast iron manifold