okay... here is the thing... last weekend after church... one of my friends was telling me that his vtec on his gsr turns on at two different rpm. he said the first one goes off around 4500 and the second one goes off at 5500... so here i am stumped and thinking that he is bs-ing... but can someone tell me if he is correct?

now as for my SOHC ex... i don't even know when the vtec kicks in... cuz it doesn't produce any kind of high pitch sound or makes me feel like the car is going any faster. does the vtec on sohc kicks in at 5500???