The Dynosty Pro-Seal headgasket is a must for all high performance 370Z VQ37VHR and VQ35HR engine builds. This MLS head gasket features a stopper ring around the cylinders and is used in all of our high performance VQ engines, proven to over 1000WHP 96MM Head Gasket is good for stock and .020" over bored VQ Engines Compressed Thickness: 0.78mm Bore 96.00mm Volume 5.64cc These MLS multi layered steel head gaskets feature a rubberized coating and a stopper ring to promote maximum seal around the combustion chamber. The Dynosty Pro-Seal VQ35HR / VQ37VHR performance head gasket set contains 2 head gaskets (left and right side)