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Anyone running one? I am considering the HMF but have read there needs to be some tuning done to go along with it. Any input would be greatly appreciated.

Rob
 

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From my previous experience, I'd say yes.

I noticed that this machine doesn't have an O2 sensor in the exhaust system....so loosing back pressure may not affect the ECU like a vehicle with an exhaust that has an O2 sensor.....that's just me though, I may be wrong.
 
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