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Special features:
*No droning
*noticeably hp & torque gain in mid-high rpm
*When valves are opened, much aggressive exhaust sound compare to stock
*When valves are closed, sound quieter than stock
*Advance vacuum actuated valvetronic technology (On, Off, TPS/RPM Auto)
*Quality-wise? Top of the market, please see our product pictures.
www.armytrix.com/s5-DM.php
This Audi S5 F1 ver. Armytrix variable exhaust is definitely louder than your neighbor's Lamborghini - GUARANTEED
