Nissan RB20det/Rb25det Manifold - GEN XNissan RB20DET RB25DETt Turbo Exhaust Manifold GEN X Great aftermarket top mount turbo manifold. When you are after quick and easy horsepower this will help your turbo vehicle out heaps. Gives better flow through the headers which in the end means more power. These look great and they won't crack like cheap stainless steel manifolds do. Top Mount Manifold Made of SS304 Stainless steel 3mm Wall thickness Less Weight, Long Durability and Less Exhaust T3