Okay so I know the valves and springs dont need touching with the s1 how about the cam gears. Do I need to upgrade those? And how about the timing belt? Thank you

 

go with s2's. I just got
them done and i replaced all my elts while i was at it. Better now than pay again later to have the belt replaced. The cam gears i was told its not a MUST but to get every bit out of the cams i guess u can get them

 

You can only run a cam gear on the exhaust a on the evo 9's. unless your running a 2.4 motor, i woudn't change it

 

Cam Gears are not needed

 

no need for an adjustable cam gear.