Stock header pipes
Road Master
Joined: Mar 2010
Posts: 934
Likes: 54
From: SE Wisconsin
That would be the way to go if you were upgrading the ecm at the same time to something like a thundermax, as they require and supply the 18mm wide band 02 sensors for that location.
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,168
From: SE Michigan
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
Gut the cats on the stock set that's what I did....I was going to buy a set already cleaned out (no cat) but they company couldn't guarantee the bungs were going to be the right size. The 02 sensors screw in, they have to be the right size so I just did it myself (nothing new for me). Had the trap door I gutted the cat with welded for $35. Took me all day on a Sat but I can tell you everything you need to know about what was done which you can't say that is you buy someone else's gut job.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,458
Likes: 672
From: Vancouver Island B.C.
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Olsen185
Exhaust System Topics
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Jul 14, 2015 12:27 AM
