I actually brought this up on my own post and I don't think any one took me serious. If you look under the heat shield you'll find the first of two catalytic converters. This fact was mentioned in the June 2000 SCC. Sorry this makes it very difficult to add headers.
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rschauby
2001 Sentra SE w/PP auto (radium)
1998 SE-R 5spd
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rschauby
2001 Sentra SE w/PP auto (radium)
1998 SE-R 5spd