So before i intalled my megan headers i had a greddy axel back and an ingen intake and i changed out the stock mid pipes. and the sound was really good,..after i installed the megan headers, my car sounded really loud. kinda annoying. does anyone know how i can fix that or why it is so freakin loud? thanks

 

get a high flow cat 2.5 inch ... and a resonator

 

2 18" or 20" resonators on the mid pipe