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Founder, 1929-2014
Speedy Bill
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Jaz-Speedway Fuel Cell Flapper Valve

Jaz-Speedway Fuel Cell Flapper Valve
Jaz-Speedway Fuel Cell Flapper Valve
Jaz-Speedway Fuel Cell Flapper Valve

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Q & A

What's in the Box

This flapper valve or rollover valve, installs in the fuel cell and is retained by the bolts used to secure the filler cap flange to the cell.

When fueling the cell, the rubber flap opens. If the cell should become inverted, the rubber flap closes to seal off the filler opening so that fuel cannot leak out.

A must have safety item! 

IMCA approved.

458-315 Instructions (pdf)


  • The mounting flange bracket is in an arc with 5 retaining studs in 1/4" diameter and 1-1/8" in length
  • It comes with the nylon sealing washers and nylock nuts
  • The rubber flapper is 6-1/4" O.D. and approximately 1/8” thick
  • The 5 holes for the mounting plate are 1/4” I.D. and the remaining 7 holes around the circumference are 9/16” I.D
  • All 12 holes are based on a 5-3/8” center to center pattern

You may also be interested in:

RCI 126 Replacement Flapper Valve, 16 Bolt
(Part #6007033)

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.

Jaz-Speedway Flapper Only
(Part #458316)
                        A must have safety item! Required by most sanctioning bodies. IMCA approved.