I was curious what the diameter of our gas caps are, because I found these earlier when looking at air ride systems.

http://www.ridetech.com/productinfo/coolcap.asp

Appears these fit 3" diameter openings.

I also noticed on that page they sell a nice lil punch/die to make 3" dia flanges, which could be really handy for those making a custom gas cap setup and needing a 3" opening.

http://www.ridetech.com/productinfo/coolcap.asp


That's a standard boat deck fill... looks exact like a SeaDog 351320-1 to me, which sell for $20-$30 at online marine supply places.

Saw one on a car at a local show, looked good. Did a quick search for the seadog cap and it is the same!! Just doesn't have "cool cap" on it. same and cheaper---thats the way to go.

lol thats so funny a 15.00 cap they are hwking for 50, with cool cap engraved on it!

Good catch all!