i have a d15b vtec with dc 4-2-1 headers, custom intake, 2 1/2" exhaust tubing to an hks muffler with a high flow cat. i want to put a cam,valve springs and retainers in it, but i heard that the cam that comes with the d15b vtec is a great cam, so im not quite sure what in going to do. i dont want to turbo cause i like all motor cars. i was thinking a b16 throttle body would be a nice ad on, but in not sure about the things to do. if anyone has any suggestions let me know.