These are a handy item to have on hand if you find yourself servicing performance fuel systems or if you are installing a new fuel rail and want some insurance in the event you damage an o-ring during an installation. These are size -908, which is the specification size for use with all -8 ORB fittings. The material is FKM, which is the ideal material for use in both petrol and ethanol systems, as well as petrol/ethanol (e85 etc) systems. Among the aftermarket parts community, -8 o-ring boss (ORB) is among the most popular size of port used on fuel rails and fuel pressure regulators. Of course, not all fuel rails and regulators use -8 ORB, so you should always check your size requirements before ordering. 

Each pack of o-rings includes 5 o-rings total.

• 5 pieces
• Size -908 for use with -8 o-ring boss (ORB) fittings
• FKM material, 75a durometer
• Compatible with petrol
• Compatible with ethanol
• Compatible with petrol/ethanol mixtures (e10, e85, etc)