just purchased a pdm-racing intake...my two cents on. right now its gets loud only at high rpms, does anyone else only get the noise at high rpms. still rattles some but i forgot to add the blue lining last night in the dark. feel some lower end pick up, and my tired tripped on a slight hill. was wondering if i have to drive more some before it is broken in?

:huh:
If you want LOUD, get a Cobb. The PDM is a bit louder, louder still with a K&N filter. As for breaking it in? Reset the ECU, there is no "break in".