Agency Power Valvetronic Exhaust Porsche 997 Turbo

4,183 views · Published 14 August 2010 · 0:23 · Indexed 8 November 2026

Channel: Vivid Racing · 2010 · Autos & Vehicles

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Sneak peak at the new Porsche 997TT valvetronic exhaust by Agency Power.  Watch the flapper valve open as the exhaust goes from standard to loud race mode at the push of a button!

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