I picked up a Screamin' Eagle® Sportster® Stage I Air Cleaner Kit and it came with oval air cleaner cover aswell for $38 off fleabay.
Today I got my 11 year old son to install it, gave him the instructions, showed him how to use a torque wrench, loctite 243 and then just guided him. He did a good job, I explained different things to him, and told how important it is to do well at school, as i was disappointed in his effort last year, I had to go to the school a number of time to ask them not to let him sit next to his mate. This year they are in different classes thank god.
Overall he did a good job, and we went for a nice road test.