Fantastic quality heads, and very well-tailored to my specific preferences. I had one custom cut for my altitude, preferences in performance, and fuel type. RK absolutely nailed it. The performance is exceptional and to my surprise fuel consumption is substantially reduced, allowing me to complete most rides with the stock tank where previously Id have needed to use my larger tank (2019 TX300). Ive been riding/racing two strokes for 30years and am quite picky. This was spot-on right out of the box.

Ordered the factory head reshape for my 2015 KTM 250XCW and from the time they received it, I had it back in my hands in about a week. The increase in low and mid-range power is impressive, even more so when compared to the cost. Would highly recommend.

The head simply did not work on my bike and he would not honer his money back guaranty, caused me a lot of problems and he would not take any responsibility at all. He would not allow me to return it.

Great product