An Agency Power customer just uploaded this video sound clip of his new Agency Power BMW M5 Electronic Valve Controlled Exhaust.  It shows the sound on quiet(normal) mode and loud(aggressive) mode.

For more information on this exhaust, CLICK HERE!

Agency Power Electronic Valve Controlled Exhaust BMW E60 M5 05+
Agency Power set out to produce the best exhaust system to appeal to the entire market. The solution is simple, create a high performance, quality built product with variable exhaust sound and performance. That is where this electronic valve controlled system thrives. The Agency Power valve controlled exhaust gives the user the ability to control the performance and sound of the exhaust with the push of a button.
Valves mounted near the muffler allow exhaust gases to either pass straight through for performance and a louder sound or be diverted into the muffler for a quieter sound. Constructed with 304 stainless steel and tig welded ensures a quality fit and durability that is an Agency Power standard with the added advantage of reducing the weight by 37lbs.
Capable of producing ~40 whp with supporting mods, the Agency Power electronic valve controlled exhaust is a must for both the street and the track.
Included:
Muffler with Valve System
Mid Pipes
Electronic Control Box
2 Remotes
Vacuum Lines
Clamps and Gaskets
All Agency Power products come with a Limited LIFETIME warranty.