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I bought a 2014 foreman 500 about 2 months ago and recently I decided I wanted a slip on muffler. But no big company’s make a slip on to fit the 14-19 body. Surely someone has figured out a way to do it by now. What’s the best way to go about it for an HMF performance slip on, without losing the o2 sensor and messing up the EFI.
 

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They are all making full systems for the newer machines with O2 sensors and regardless of whether you put a full system on it or a slip on the EFI is going to get “messed up” and will need to be retuned.

I have heard of guys cheaping out and just cutting and welding other exhausts on it. HMF’s for an older model or whatever. But you still need a tuner. Most are deleting the factory O2 sensor.


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