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Exhaust headers for 1986 NA, plus other exhuast issues

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  • Exhaust headers for 1986 NA, plus other exhuast issues

    Folks, I am doing some tinkering with my Zed over the next few months and am wondering what experience someone might have with headers for these cars?
    Right now the car is quite stock, and I don't intend on doing any major upgrades, am open to doing some improvements to it.
    My concerns about headers are heat, noise, and whether headers typically have provisions for the O2 sensor. As I'm sure everyone knows things are really packed in tight, so will the heat from the headers cause other issues?

    How much extra noise will they have, and how necessary are they? Do the factory manifolds have decent flow?

    Someone has put a K&N filter on the intake already.

    Also, at some point in it's past there have been a few restrictions put in the system. Two in the head pipe. It looks like a long time ago one side of the head pipe was pushed nearly halfway in near where the steering shaft passes by it. I'm not sure why, as there is lots of room for it, but it is there.
    Lower down, near the converter a smaller piece of pipe was inserted and welded up nicely. Then at the back where the tailpipe passes by part of the emergency brake, it was heated up and banged in to clear. It would seem that whoever did the repairs had the tailpipe off a few degrees when they welded it up, so just did that so as not to have to cut it and re weld.
    Which brings me to the last point, the whole system has been welded together from front to back, it only bolts to the manifold. The welding is good quality, so I suspect it was professionally done. It has had a new converter put on recently (not by me), which is now rattling, so that will likely need to be replaced again.

    So this seems like an all or nothing kind of job once I take it apart.
    What are the aftermarket cat back systems like?
    Thank you.

  • #2
    So I had some discussion with Low last night during the virtual meeting, and he suggested a Magnaflow system, which has a nice throaty sound which I want, but not over the top noisy, and some other folks seconded his thoughts. That is a well known brand, and the quality is supposed to be good as well.
    So I thinking that is the direction I'm going to go.
    Any other opinions are still welcome.