Ther are actually 10- M6 bolts that bolt down the heads top to the head its self.Ther is no heads top gasket for this model but only Rtv gasket sealent to be usted.It must cure on it's own time for 24-hours before a start-up.Follow the slackening sequence and re-use it as the tightening sequence!!!. I will not use a torque wrench but will only tighten down by feel and hopefully evenly as the heads top is also acts as the camshaft caps that hold down and align the cam shaft seating position in the unit its self.