RS-R Exmag
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Joined: Jul 2004
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To bolt a header with a 2.5" collector to a stock cat, you need to cut off the stock header flange on the cat and have a 2.5" flange welded on. In addition, you will need a 2.5" donut flange. You don't need a bracket.
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Joined: Apr 2007
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From: St.Louis MO
I wouldnt recommand you reuse your stock cat... unless your trying to save $.. go buy a 2.5 or 225 carsound cat from ebay...its like $55 for Cat and $6 for the flaanges..
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Yeah, I don't really recommend it either. I was just giving the bare minimum required parts in order to bolt on that header.
On permanent hiatus
Joined: Jul 2004
Posts: 9,716
Likes: 0
From: A forum with actual tech