i just install my 4-1 DC header.
the promblem is i think igot a leak between the header and the cat, it sounds like
a hole in the muffler noise. any one know how 2 fix that promblem
or any one have experience this promblem before.

help it sounds like sh*t

 

get a new gasket for the cat

 

where can i get gasket from or
can i put gasket sealer around the end pipe
and then connect the pipe to the cat?
wat do u think

 

any sugestons out there i know alot of people have put on header before

 

fu*k i strip the bolt to the cat
can i use any kind of bolt or do i need the
bolt that the spring bolts 2?

 

You can use any bolt, just as long as you get the downpipe and cat to seat together correctly.
My bolts were too rusted, so i took some that were threaded all the way up and just slapped those on. Worked fine. Not sure if the springs are truely necessary though.

 

no you don't need the springs but it's there for the vibration coming from the engine. any bolts will do as long as it's long enough. the best bet for a gasket is the local muffler shop.

 

just wondering but did you even put a donut gasket on the header? if you dont got one goto a dealer or like the other guy said a muffler shop.

 

got the dounut cumming,
will that stop the noise that im hearing?
also will that dounut fit on the DC 4-1 header?
im just curious hoping that it will fit
what do you guys think

 

dont know which donut gasket you bought??
pretty sure you need 2.5 inch....
if that isnt what you got... Dave "SMSP" on this board can get them for $13
but that should clear up your problem.

p.s. - BulliztyK https://honda-tech.com/zerothread?id=571774 possible meet for sd, mn, nd, ne, and ia!! check it out!

 

i got the donut from checkers
is that right

 

I am having EXACTLY the same problem with the DC Ceramic 4-2-1 header. I HAVE the gasket, and it STILL leaks. Starting to **** me off. Mine has a bit of an alignment problem (had to shove the cat around a lot to get things to mate) and removing the block hanger for the second section seemingly has no effect. Does your DC header line up to the cat properly, or is it a little off? I saw an article some months back in Grassroots Motorsports that they had the same problem, but I can't find it now...

Thanks for your input

Matt

 

yeah my header is is not line up right either
its a little slanted, but i got the 2 bolts 2 go through. i dont know what size the donut is,
they say its a oem fit 4 the civics and integra
so does that mean it fits, on the DC 4-1 header