Redline240 wrote:is that right
no
Quote »and are they 3"? [/quote] yes, if u want them to be.
Like previously stated, it just replaces the cat. It attatches to from the end of the downpipe, to the start of your "previously" cat-back exhaust....
I have just a 3" pipe attatched to the downpipe, and welded on the other end to the exhaust. Doing it with a premade pipe(like the ones sold), attatchable on both sides of course makes it possible to take off whenever wanted, which is a nice to thing to have...Or you can just always go to a muffler shop and ask them to make you one, but it most likely wont cost you less than $100.
Quote »so a test pipe will go from the manifold to the cat back[/quote]UM.....well actually the turbo attatches to the manifold.....
[atleast thats what i consider a test pipe, there seems to always be a lot of different opinions on what a test pipe is : )]