I have an 07 WR450 that I race in Hare scrambles. The bike has a 08 YZ header and can with PMB SA and silent insert to meet 96db's as well as all free mods. I'm looking for more torque off the bottom to mid. Or maybe just a stronger pull everywhere. I'm not looking for a hit, I like my smooth power for the tight gnarly stuff. Just more of that deep old school 4 stroke grunt. I've been told the hot ticket is the 06 YZ intake cam with a high compression piston. Since I will be swapping the piston out this winter anyways I thought I'd give this a try. I'm not interested in swapping out the exhaust cam for the YZ for estart issues and Hot Cams because I'm not really into spending the $'s. So if I'm correct the intake cams on the YZ's were different through these years. Which intake cam do you think would best suit my needs ? Or do I just go with the Hot Cams intake for an extra $20 or so ?