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I’m wanting to put a new Big Gun exhaust on my Sportsman 850 and I’ve read that some people say it isn’t 100% necessary to have a tuner when putting on a new slip on exhaust. I was wondering if not having a tuner would hurt my engine or Atv in anyway. I can afford an exhaust but can’t justify both. Any suggestions are great.
 

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I’m wanting to put a new Big Gun exhaust on my Sportsman 850 and I’ve read that some people say it isn’t 100% necessary to have a tuner when putting on a new slip on exhaust. I was wondering if not having a tuner would hurt my engine or Atv in anyway. I can afford an exhaust but can’t justify both. Any suggestions are great.
its will give like 3 horse power and make it louder but you NEED a jet kit or you run the chance of runing ur bike lean and blowing it up but Ur OK as long as u have the correct jetting
 
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