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There are many reasons why Autotech’s Kit is superior
you may wish to send in your original trim for a £30
although we usually recommend the help of a professional for fitment
The factory grille leaves provisions that allow intake air into the inlet duct on the passenger side but leaves out a direct flow-path to the air inlet on the driver's side
034Motorsport Stainless Steel Racing Catalyst, B9 Audi S4/S5 Unit There are many reasons whyProduct Description: The 034Motorsport Stainless Steel Racing Catalyst for B9 Audi S4 S5 is designed as a drop in replacement for the restrictive factory catalytic converter. The Stainless Steel Racing Catalyst offers increased horsepower and torque throughout the powerband, reduced turbocharger lag, improved throttle response, and an enhanced exhaust note. This upgrade eliminates the primary flow limitation in the factory exhaust system, allowing you