...Aviation Form a Gasket on the head itself. His reasoning being that it will need to be redone in the future, and that the Form a Gasket is very hard to clean off the soft aluminum head. Mike Washington reminded me of this; he`s finishing up his job using the Dinan kit. Dinan recommended using the Form a Gasket on all surfaces. They also recommend that you retorque the bolts and nuts (both sides) after waiting about 10 minutes. The rubber has some squish that you need to account for. Torque to about 7.5 ft-lbs. John 88 ///M3 Cinnabar