Well lets see, first Ill tell you its easier than I thought. I thought I would have a problem getting the crank bolt out, nope easy. But, Ill tell you guys using the Harmonic pullint tool, took 4-ever. But Im done, glad I did it. No real noticable gain other than the car gets to higher RPMs much faster. I would reccomed it to anyone. Oh buy the way Steeda says if your wondering torque it to 66 flbs then back out 1 full turn then torque to 37 flbs then turn another 90 degrees. Super easy!!