Mallory Manifold Kit for Mercruiser 305 - 350 V8 GM Kit includes the following:
2 Manifolds 9-40507
2 Risers 9-40559
2 Manifold gasket kits with bolts 9-40573
2 Riser gasket kits with bolts 9-40578
This is a complete Kit includes everything listed above and in the picture.