they are very expensive, in excess of 5k and can go as high as 10k i beleive for their motors. Briann510 has one in his 240 and he is in the low 12s i beleive and he is not getting traction. Rebello has a very good warranty on their motors but dont quote me on that, might wanna ask Brian. But unless you just wanna have a very stout N/A inline 6, there are much easier, and cheaper ways to go fast.