Our manifold is different than the standard Riva/Factory Pipe exhaust manifold. We used the same casting but we modified the length. We also removed the Riva logo from the ones we sold and put our logo on them.
We also made some pipes for Riva Yamaha. It's the exact same pipe as ours but we left their logo on the manifold. The manifolds were then powder coated red and the chambers were black. I think Riva sold them as their high rev dry pipe.