yeah dude...I think you want item #7 in this link...it's called an "O-ring"
click here
For only one part I wouldn't buy it at this place tho...They have a $5 handling charge for each order...For the $1.23 o-ring, you can prolly go to auto zone or even Honda for that part and save $$...however, when you are buying lotsa stuff, nobody beats Majestic Honda.
If I went to get this part I would call it the 'distributor shaft seal'....