Daul exhuast will add horse power and if you add a seperate muffler and converter, it should even be quiter. Is it legal in Iowa to make that type of madification. Tennessee allows it in my county. We don't even get annual inspection. I believe that Iowa has a tighter view of exhaust. The O2 sensor measures the percentage of Oxygen, and along with other sensors determines how much air the engine recieves to fuel. The percentage of oxygen to exhaust gas from haf the engine should be the same as from the total exhaust, Though I would only put the O2 sensor on one side. If you, however, must be inspected annually and they visually inspect this stuff, I wouldn't bother doing it, as you will be changing it out to get your sticker. I'll share a cool story. New Hampshire required that a rusted through hole is a failure. They salt the roads. I had a very old pick up, that because of it's age beats the emission rules, but had plenty of rust holes. Just before I would go to get my inspection, I would sling drywall compound all over the rust holes. I always got the sticker, though the next rain would wash away all the "body compound". Because the local mechanic knew I did sheetrock, it looked like I was just a messy one. Maybe he knew, maybe he didn't, but I got my sticker.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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