Product Summary

Universal Fit, Plastic, 4.40" Overall Length

    Key Specs

    Material TypePlastic
    Overall Length4.40"
    Overall Width3.75"
    Overall Thickness.03"

    Need To Know

    Free Shipping on Orders Over $149

    Shipping Policies & FAQs

    Quick and Easy Returns

    Return Policy


    This fuel tank cap seal flapper is designed to retrofit all RCI Circle Track cells with the 16 bolt oval type 4" cap assemblies.

    This flapper is designed to slow the fuel leakage in the event of a vehicle roll over.

    A must have safety item! 

    • Replacement nylon flapper valve for all "16 bolt top" RCI fuel cells
    • Compatible with gas or alcohol
    • Overall Length: 4-3/8"
    • Overall Width: 3-3/4"
    • Overall Thickness: .03"
    • Clear plastic material

    Note: Per vendor, this flapper valve should be replaced on a yearly basis.

    IMCA Approved.

    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    Material TypePlastic
    Overall Length4.40"
    Overall Width3.75"
    Overall Thickness.03"
    Sold in QuantityEach