Part#AS0138 - AussieSpeed cast iron headers to suit Holden Grey 138 motor.  These exhaust manifolds for the Holden grey are made from hard cast iron and they are thick and heavy, just what you need for a durable exhaust manifold. The design is based on the original early performance headers that were available for the grey in the old days, however they are a much improved durable design and feature modern exhaust flange fittings. The modern exhaust pipe coupling fittings allow you to easily obtain gaskets from any exhaust shop when you want them and allows the exhaust shop to easily make up new pipes at any time in the future. These headers are supplied as you see pictured here as a pair with flange plates, gaskets and bolts for the exhaust pipe side.