Hey all, i was thinking about purchasing a set of CTR cams. I am wondering how much of a performance difference i will get from them over my stock cams. Also, do i need to buy both intake and exhaust cams or just the intake cam if the CTR exhaust cam is the same as my current one. thanks in adavance. Oh, almost forgot - how much higher will i need to rev to take full advantage of the new cams? Will i need CTR springs and retainers (im asuming so)?