here's the thing, when i accelarating my car like between 1st through third gear i heard some "zzzzzzzzzz" noise from front of my car. sound like somewhere is leaking air. i recently install a dc header. anyone know what's happening

 

Maybe a leak in the header? Check the welds - air escaping at high pressure can create a whizzing sound.

 

I had a rattling noise in my car once. I took off the trim under the steering wheel and found a lonely 1985 penny trying to communicate thru Morse Code.

 

NVS - lol! that's a great story. What was it trying to say?

 

this car is money

 

would this be the same noise.
i have a few more mods done like cai, im, e, and the header also. My cai i dont beileve ths is bad but it make a whsttle sound and i am pretty sure it comes from my cai, filter, i guess it s just really free flowing. but if u dont have a cold air intake yes, deffinentily check the header bolts and welding leaks.

 

I don't know. I got up to the part where he said "John Wilkes Booth be damned..." That's when I found the President and pitched him into my lawn, never to be seen, or heard, again.