Oil filters soak in a lot of heat from high performance engines. They are nestled tight to the oil pan and engine. DEI’s Oil Filter Heat Shield effectively blocks radiant heat that can change the oils viscosity or potentially cause a thermal breakdown that will make the oil additives degrade, dissipate, and wear out quickly. Oil Cover Filters are easy to install due to their peel and stick adhesive backing. They block heat and reduce oil temps. Universal trim to fit size works on all oil filters and come in a 3 pack.