Please keep in mind that performing anything suggested in this instructable is at your own risk. If you have no experience with a dremel, practice, this project is potentially dangerous if not approached properly.
Now that the disclaimer is out of the way, let's get started.
This instructable is for anyone looking to get a bit more performance out of their car and learn a bit more about their car in the process. The basic principle behind modifying a car is to have more air/fuel enter the combustion chamber. The port and polish basically makes it easier for air/fuel to flow into the combustion chamber and gasket matching permits a greater volume. (more gas and air equals bigger/more powerful explosion equals more torque and horsepower)
Keep in mind that this is a very large project. I have put over 20 working hours into my sunfire's head.
Step 1: Gather Materials and Tools
For this you will need:
1 or 2 heads (car dependent)
Various sanding bits for the dremel
Face mask (inhaling metal shavings is no fun)
High Accuracy measuring device (optional and preferable for those who intend to get really serious with this project)