EVERY one I've seen has been a turd.. except one.. I'm not impressed at all by them... Keep in mind.. these big power motors will loose 15-20%hp when the get transplanted into a quad chassis. I've beating 90% of the ones I raced with my lil 4mil cub. And I've been beatin by stock stroke stock cylinder builds... Its still cheaper to do a banshee based motor by the time you factor in labor, and it will be faster.