Install was really easy took about 15 minutes. Sound is exactly what I was looking for and you can definitely feel power gains over the stock set up. I will run Dr D exhaust on all of my bikes from now on.
Dr. D NS-4 Slip-On Exhaust
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Throttle response better much lighter than factory,easy to install.
Bolted right on to 2013 kx250f. Sounds great. looks great and the increase in horsepower is always good