AKRAPOVIC RACING STEEL MANIFOLDS KAWASAKI Z 900 2020-2023AKRAPOVIC RACING MANIFOLDS Code: E K9R4 Manifold material: Stainless steel NOT Approved. They are simple to install and replace standard headers, offering the best compromise between price and performance. The performance of the Slip On Line exhausts can be further enhanced with the addition of the optional stainless steel header. When this beautifully finished header is added to any Slip On line exhaust for the Z900, it transforms the muffler into a