cam question

[Mrpug]

Ive been seeing on occation people using two exhaust cams. What is the reason for this? I know that bigger cams mean more power and all. Does the exhaust cam have this feature and if so what differences can one expect?

[Agreeable Slick]

Exhaust cam is slightly larger. All it does is keep the inlet valves open longer so you get more air/fuel in the cylinder before combustion. Hence a bit more power.