3" exhaust flange to 2.5" ???

[EverythingFallsApart]

I got this header for my na. It was designed to work with a 3" cat back so from the cat back it's 3" pipe yet my cat-back is 2.5" so it doesn't fit. Big exhaust leak. I failed to remember this when I purchased the header. What are my options here? is there some sort of metal gasket I can purchase that has a 2.5" opening? Or is my only option to take it to a muffler shop and have a new flange made? The 3" pipe is welded to the cat as well so I can't just remove it.. thanks.

 

[JENNY!]

go 3inch

 

[EverythingFallsApart]

It's a na keep in mind.

 

[supra90turbo]

Have the muffler shop make you a test pipe with a 3" flange on one side, and a 2.5" on the other.

Either that or go full 3"
all the backpressure you need is located in the manifold.

 

[EverythingFallsApart]

Have the muffler shop make you a test pipe with a 3" flange on one side, and a 2.5" on the other.

Either that or go full 3"
all the backpressure you need is located in the manifold.

The header pipe to cat is 2.5". I think the test pipe idea sounds like what i might have to do. I don't see many other options unless I go 3" exhaust. I'm really trying not to spend too much. Don't have emissions in florida so won't have to worry about the cat.

 

[dbsupra90]

not sure if the muffler shop would make a test pipe. but what i would use is a 3 to 2.5 reducer.

something like this: http://cgi.ebay.com/ebaymotors/3-x-...r-Reducer_W0QQitemZ120080790415QQcmdZViewItem

you can get in alum steel or mild steel for 1/2 that price or less.

personally i wouldnt do 3" on a na motor.