I'm not a big fan of ram horns on street cars for the following problems..

They produce a massive amount of heat under the hood, Usually dis-coloring the paint on the hood and valve cover.
They also tend to heat soak the radiator, making it work twice as hard to cool the engine.Oftern causing over heating when sitting in trafficor idling.
There is a reason Honda install a large heat shield on there factory manifolds. This is not because they have too many heat shields and need to get rid of them some how. They contain the heat inside the manifold .
Ramhorns do make power, but shorty manifold if built correctly make plenty of power , allow more room for AC, PS and cooling fans.

Thanks for the kind words guys.