I found some cheap headers on ebay that are 4-2-1 two piece design and are made for DA tegs with b18 motors, but they have 1 o2 sensor bung in the first pair of runners and the second o2 bung in the collector. Do you think that my car would run ok if i used an the right o2 bung for the one set of primaries and the other in the collector using an extension harness? or do you think that I should just get another bung welded into the other pair of primaries?

im just buying this to replace the rusted cast iron exhaust manifold so I can save some weight and for it too look a little cleaner. not really for performance gains.

thanks guys

 

what your asking is will it be ok to have an o2 on the runner then the other near the cat right?
ya it will be fine if thats what you are asking

 

Yea that's what I'm asking sorry it was unclear. So you don't think that the secondary o2 sensore would get a bad reading from there?