Just take your gas cap and flip it over and you will see two little screws, remove them and take the bottom cover off and you will find two small ball bearings, take them both out and SAVE THEM. put everything back together and walla! you have a high flowing gas cap. Not recommended by the DOT.(department of transportation) as the fuel can splash out of the vent tube during a roll-over. Geez,I love redneck engineering!