your all a bunch of fucking retards. if you put an rb20 in an s14 you should be castrated. a ka-t is the cheapest easiest way to get 200whp in an s14. sr20 is not bad, but your going to pay through the nose for more than 300whp. the 2jz sounds like a good idea till he explains to you that your getting an auto, which isnt bad cause if you buy a good torque converter then it'll lay down like 500whp with no problems. if its a manual for $2500 be warey, the good manual trans you want to make big power is $2500. the 25 is a good swap, costs the same as a 20 swap but you get more. if your shooting for more than 400hp you need to swap out the pistons and do some other upgrades to the oiling system, but youd have to do that to the 20 too. i've had a ka an sr and an rb25 in my 14. the rb25 is far and away the best of the 3 and i did it for almost exactly half of a serious offer someone made me about a week ago.

do the ka-t, keep it under 250whp, and you'll be straight.