ok i just got a new header, it is an edelbrock 4-2-1 2 piece. i put it on and tightened everything down with the new header gasket and new donut. when i tried to start it up and right where the header meets the cat sounds really loud and im not sure why. is it suppose to sound like that? i have had a dc 4-1 that i also put on and never had that problem so im thinking it might just be the header. i got under the car and it doesnt sound like its leaking but when your in the car you can hear what sounds like a leak right in front of the shifter when i shift! thanks for any help guys!!!!!
~jeff

 

did you check elsewhere? it might sound like it's coming from there, but it could be coming from the point where the two pieces come together or at the head.

also is your o2 sensor tight? could be leaking there.

 

i put the car up on jack stands got under it and it isnt leaking from the head i didnt check where they meet yet but i think im gonna recheck the o2 sensor one more time! when i drive it the sound reminds me of like a ups truck for some reason. bump for any more suggestions!!!!

 

bump for some more help!

 

did you use a gasket where the 2piece connect? also if you torque everything right it should be fine.

 

yeah i used the gaskets that came with the header. it really sounds like it is more right where the header meets the cat.