Nissan RB20/25 Manifold Steel GasketPermaseal Turbo Exhaust Manifold Gasket Set for Nissan Skyline Rb20det Rb25det Vehicles in multi layered steel When your current exhaust manifold gaskets are blown or you are replacing your manifold these are the best suited gaskets and the highest quality. Direct fitment as individual pieces to make it easy to align them. Multi layered pressed steel gasket Direct fitment to Rb20 Rb25 engines High quality steel Included: x6 individual exhaust manifold