If you're replacing your 2000-04 Mustang vapor valve, then it's a must to replace the vapor valve seal. Over time this seal rots and deteriorates causing fumes and fuel to leak through. This original replacement will get you back in business to do the job right! The vapor valve seal goes into the tank and holds the vapor valve in place. Look no further than Latemodel Restoration for all of the Mustang parts you're looking for!
I purchased both seals, because I wasn't sure which one I could use . It had to fit 94 Lightning new front tank. It fit good and since then, when I fill the tank I don't smell fumes. They had the sizes of the seals so I could make a better choice. The reason I gave them a 4 was I needed them yesterday, so I had to have them shipped red label, I believe they could have put them in an envelope and saved me some money on shipping.