Cometic Exhaust Manifold Gaskets utilize the same technology that goes into Cometic Headgaskets. Offered in MLS (Multi Layered Steel) Cometic Exhaust Manifold Gaskets will give you years of reliable performance. * Maintains Torque Setting * Withstands Different Combinations of Cylinder Head & Exhaust Manifold Materials * Will Not Push Out or Burn Through PartNumber : cgC4177-030 Description : Exhaust Manifold Gasket; Each Engine : Nissan RB-20/RB-25 Inline 6 Thickness : .030" Thickness : .030in Position : N/A Add-On Part : NA Title : C4177-030 - Cometic Gaskets - .030in. MLS Exhaust Manifold Gasket Exhaust, Mufflers & Tips::Exhaust Gaskets