Proflow Fuel Injector O-Rings, 14mm, 8.50mm ID x 3.0mm CS, E85 Safe, Universal, 2-Pack
$1.85
Common 14mm injector o-ring found in most fuel injector designs.
These can be used on LS injectors when replacing the bottom factory 16mm injector to use in aftermarket intakes with 14mm bores.