Hey guys. I have an 04 accord 4cyl. Just like everyone else I need more power out of my engine. Instead of spending a grand on intake, header and exhaust to gain a simple 10 hp I want to go for the cams. $600-$700 for skunk2. My questions is: Are there any other internal modifications needed to install cams in my stock k24a4. Rockers, spring, retainers, ECM program? I am looking at the stage 3 which claims to keep stock idle.