Oh really I didn’t realize all that plays a factor. All I have in my car right now is an AEM CAI, and when you hit about 4grand it starts to get loud. So as soon as I get some more $ I was going to get some headers (don’t know what kind I’m going do research them a little more) so I was curious, In general does headers make your car louder. I don’t have a test pipe or a after market muffler or any thing except a CAI.