i put this pipe on my 2016 yz450fx and now touching the throttle is like hitting a nitrous button, love it
Dr. D NS-4 Complete Exhaust
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i've been using Dr. D's in every bike that i have and i'm comfortable with it . for me and my friends its Dr. D or nothing .
it is causing a lot problems with my jetting even after going to Dr. D's website. Still not able to get it to stop back firing all because I changed to this pipe.
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