[TatII]

what everyone referrs to as S13 S14 and S15 is basically the chassis code of each generation of 240's. in japan the 240 is called a silvia. thats where the name S comes from. now the most well known ones are the hatchbacks, and coupes from 89-94. now those are S13's. the generation after that are basically the same thing but newer so its called a S14. and the S15 never came out in the states because the unite states suck. and if your new to the whole car thing. i suggest you have someone else do the work for you. or have someone who knows alot about cars whos also your friend to teach you. and the SR20DET is a very very good motor. those are the j spec motors that comes with the silvia's in japan. you can get 300hp out of them without really breakin a sweat.