Ok, got my headers in a few days ago..and where the downpipe connects to the cat, it is leaking..it sounds like shit..is their some type of gasket that goes in their because it never came with one..you can tell by just looking at it, it doesnt seal right..any help would be appreciated..

 

check the old stock header for the metal exhaust gasket, sometimes it a bitch to get off so you have to take two prybar/screwdriver's and pry it off.
its kinda round so the cat fits over, doesn't even really look like a gasket, or you can make one out of the metal tape shit exhaust shops have. hth

 

Do the bolts match up? A lot of headers are 3 bolt even though the cat is a 2 bolt, in which case you'll have to go to a shop and get it welded. My friend had to on his CD5 after I put his header on, only cost him $80.

 

yeah its 2 bolt but its just not sealing right..so i take the rounded stock one off? it looks like it won't fit..ill try that today..

 

get it welded, mine was wicked rattly after I put on my header and connected it to my stock cat. Welding = problem solved.

 

na no need son..did what dude said, and its nice and quiet now..

 

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no, if it bolts together and there is a flange on one of the pipes. like it sticks out a little bit then you get that high heat liquid gasket. its black, goes on as gel and cures hard. its like 6 bucks at advanced auto