2000 c230 k loud at 3000 rpm's

[algee101]

I know that the C230 komperssors are normaly a noisey runing, but at 110k miles, I had replaced the supercharger, because it was worn (metal to metal), and although the new one is fine, I feel the vehcile is still loud. Is the exaust an issue at that amount of miles, or could it be something else? The road noise is common with the tires, but the loudness does come from the engine and exaust at the 3000 rpm (80mph). any help would be nice.