My Gibson drones as well @ around 1600 to 1800 rpm around town pulling hills and such, but cruising just maintaining your speed it just rumbles deep (no drone) around town or on the highway...One of my friends has the borla on his titan, the whole system is louder than the gibson, tail pipe and the in cab drone..

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05 Titan SE-KC 4x4 Smoke
Westin Bull Bar, W/ 5" KC's
Airaid Intake
Gibson Single Side Stainless
Kickin' Sound System-Alpine, MB Quart, JL
Mike...