another cam question

I just bought a basic all-around cam from Web Cam. I didn't need to change valve springs, but they recommended hard facing rockers. Do I really need to do this or do they just want my money? I installed a White Brothers E Series Pro Meg and K & N filter with 6 one inch vents in the air box. Any jetting specs would be appreciated.

Thanks

[330exracer]

yah u kind of do. when you put in a new cam you should either put new rockers or harden them. hardenig would be better though because they take longer to wear. but you don't need 2 just a sugestion.