Gaskets. At a glance they seem unimportant, yet without them, fluids would leak from every joint, fuel would spew, and flaming gases would explode from every crevice once the spark plug flashed.
One key area of differentiation - and a leading contributor to gasket reliability - is the number of layers in each MLS design, according to Fel-Pro(R) Performance Gaskets Product Manager Ron Rotunno.