Larger intake valves

[GordonP]

Originally Posted by Truckerjim

Makes the engine breather better for more power and maybe even more horsepower

Doesn't what comes in have to go out through the exhaust valve? Seems to me the only way to get more out the exhaust is to either make it bigger or increase the pressure, no?

Is anybody out there running an engine like this? My first inclination is to have the inserts redone back to stock.