Vent Topper for regular tanks.
M&M Boys Vent Topper.
We have put this vent topper together specifically to be used on our regular fuel tanks.
Our vent topper is equipped with an in line roll over valve.
Please note:
This in line valve is not spring-loaded and depends on gravity to close the valve in a rollover.

M&M Boys Demo Products is not responsible for any accidents and/or injuries incurred from the use of any of our products in any way. 
Driving in a demolition derby is a dangerous sport, and the buyer drives at his own risk.