Works with 1-1/2 filler neck hose. Non-vented cap design - gas tank vent is recommended. 12 inch rubber hose and clamps included.
Some air might get past the threads that hold the cap on, but there is no dedicated venting passage. Speedway Motors is America's Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 73 years.