Product details:

Our Billet Pressure Relief Spacer plates are second to none in both quality and performance. 6061 Billet aluminum plate, Spring loaded panels, Sealed with a captured grove Oring, Works as 1 inch spacer as well. The relief plates can help save your intake in the event of a cough or backfire! The spring loaded panel will unseat allowing the pressure to escape instead of destroying your intake. Cheap insurance! Fits any 4500 style flange, Carb or EFI. *Note What sets our Relief plate apart from the others, The captured grove for the oring allows the oring to stay seated in the event of the panel opening unlike others blowing out!