About Eisenmann Exhaust Eisenmann exhausts are engineered and hand-crafted in Stuttgart, Germany. Every Eisenmann exhaust represents the latest technology combined with the finest handmade craftsmanship. Eisenmann's laser CNC machining and sheet metal processing centers ensure that the fabrication of each exhaust is only of the highest quality. To this end, Eisenmann is TüV approved and has earned DIN EN ISO 9001 certification for quality. The Eisenmann Race exhaust is constructed from 100% lightweight stainless steel and is designed to increase performance while providing a deep sporty sound. Eisenmann Race Exhaust Features: Increased performance Improved sound quality Deeper exhaust tone Choice of tip styles Significantly lighter weight compared to stock exhaust High quality, hand crafted Eisenmann Race Exhaust upside vs. stock 35-70% lighter weight Up to 6.5% hp gain Louder and deeper sound Choice of tip style Eisenmann Race Exhaust upside vs. Eisenmann Sport Exhaust Lighter weight More hp gain Deeper race-like sound  Eisenmann Exhaust Sound Clips: Many of our individual product listsings feature sound and video clips. Each of our Eisenmann Exhaust products is precisely configured to fit individual Audi models.  To see how the Eisenmann Exhaust fits your specific Audi vehicle use the Year and Model menu.